Question # 1

The phenomenon of blending of around edges of an obstacle is called:

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Interfarance

Defraction

Polorisation

None of above

The light signal in graded index fibre is totally confined due to

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Total inernal reflection

Continuous refraction

Both a and b

Dispersion

The rate of change of momentum of a molecule is equal to:

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Pressure

Work

Density

Force

When the velocity of the car is constant. The velocity time graph is a

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Straight line

straight line rises the same height for equal intervals of time

Horizontal straight line

None of these

Moment of inertia of an object does not depend upon

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Mass of object

Mass distribution

Angular velocity

Axis of rotation

Newtons third law says, that the action and reactions are

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Equal but in the same direction

Equal but in opposite direction

May be unequal but in the same direction

May be unequal but in opposite direction

The couple arm is

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The smallest distance between two equal and anti parallel forces

The greatest distance between two equal and anti parallel forces

The lines of action of two equal and opposite forces

None of these

Torque producing clockwise rotation is taken as

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negative

positive

zero

both negative and positive

Which one is numeric quantity?

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Strain

Plane Angle

Impulse

both A and B

Solids which have no regular atomic structure are called

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Crystalline solid

elastic solid

Glassy solid

All of these

The dimensions of intensity of energy are

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MLT⁺²⁷T¹

MLT²T²

ML³

MLT^-2T³

Which of the following is not dimension less

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Poission ration

Sharing strain

Longitudinal strain

Volume stress

Which of the material have largest value of young's modulus

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Copper

Diamond

Aluminum

Iron

If the instant velocity does not change, the body is moving with a

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Initial velocity

Variable velocity

Uniform velocity

None of these

Wavelength of X-rays falling at glace angle 30° on crystal with atomic spacing 2 x 10^-9m for the first order diffraction is

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4 x 10^-6m

2 x 10^-10m

0.2 x 10^-10m

20 x 10^-10m

Solid Angle can be _________ only.

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Practically measure

theoretically measure

Both a and b

Sometimes practically measure and sometimes theoretically measure

In Huygen's wave theory the locus of all points in the same state of vibration is called

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A half-period zone

Vibrator

Wave front

A ray

At the top of the trajectory of a projectile the directions of its velocity and acceleration are

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Perpendicular to each other

Parallel to each other

Inclined to each other at an angle of 45°

Antiparallel to each other

Which of the following cannot have an effect on the weight of an object?

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The distance of the object from a planet

The acceleration of the object

The placement of the object on a different planet

The mass of the object

A thorium nucleus is formed when a uranium nucleus emits an 𝑎 −particles. Atomic number of thorium is :

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23

60

90

70

A body moving with uniform velocity has

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positive acceleration

negative acceleration

infinite acceleration

zero acceleration

Albert A. Michelson devised interferometer is

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1820

1845

1860

1881

The ratio of SI units to CGS units of gravitational constant G will be

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10^-3

10

10²

10³

The first superconductor was discovered by

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Fermi

Kmaerlinghormes

Weinberg

None of these

Displacement is a physical quantity, which is a

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Scalar

Vector

Variable quality

None of these

A motor runs at 20 rev/s and supplies a torque of 75Nm. Power delivered by it is

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6.12 hp

12.6 hp

7.3 hp

8.3 hp

Approximate power of colour T.V. in watt is

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90

100

130

120

Angular displacement is a vector quantity for

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Small value of Δθ

Very small value of Δθ

All values of Δθ

None of these

The maximum and minimum magnitudes of the resultant of two given vectors are 17 units and 7 units respectively.If these two vectors are at right angles to each other.the magnitude of their resultant is

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14

16

18

13

A compound microscope is consists of

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One convex lens

Two convex lenses

Two concave lenses

None of these

Electric intensity inside a hollow sphere is

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Minimum

Maximum

q / c_o

Zero

The Dimension of acceleration is

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[L²T]

[LT²]

[LT^-2]

None of these

Significant figure in 0.00110

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One

Two

Three

Four

In Young s double slit experiment the separation between the slits in halved and the distance between the slits and the screen is doubled the fringe with will

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Be doubled

Be quadrupled

Remain the same

Be halved

When the body is at rest the relation

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W - T = ma

T - W = ma

T = W

None of these

In 1986 a new class of ceramic material was discovered at temperature as high as

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19 K

78 K

108 K

12 K

If the red light is replaced by blue light illuminating the object in a microscope the resolving power of the microscope

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Decreases

Increases

Gets halved

Remains unchanged

Shear modulus for water is

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- 4.7

- 3.3

- 1.2

0

One cannot see through fog because

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Fog absorbs light

The refractive index of fog is infinity

Light suffers total reflection at the droplet in a fog

Light is scattered by the droplets in fog

The angle between two vectors -2î + 3ĵ + k̂ and î + 2ĵ-4k̂ is:

Choose an answer

0°

90°

180°

None of the above

The high-tensile steel used to support the roadway of a suspension bridge breaks under a stress of 2 x 10⁹Pa. Find the minimum cross-sectional area for a cable if it is to support a load of mass 2 x 10⁵kg.

(g = 10 N kg^-1)

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10^-2m²

10^-1m²

10^-4m²

10^-3m²

With a step-index fibre, the overall time difference between all the wavelengths arrived at the other end may be about

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43 s per km

33 s per km

1 ns per km

33 ns per km

For obtaining equal and same height mirror should be

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Convex

Concave

Plane

None

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Find the range of the projectile, having speed 30 ms^-1in a direction 30° above the horizon

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50 m

80 m

90 m

100 m

The quality of the moving body is called

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Motion

Momentum

Force

None of these

Identify practical use of superconductor

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MRI

Super computer

Magnetic levitation train

All above

Scientific notation which can be expressed in the

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Negative powers

Powers of ten

Decimals

None of these

The diodes works on

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A.C

D.C

both A and B

None of these

Under a constant torque,the angular momentum of a body changes from A to 4A second find the torque.

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(3/4)A

(1/4)A

3A

(4/3)A

The relative permitivity ∈_r for rubber is

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2.8

3.0

2.90

2.94

When the second condition for equilibrium, is satisfied then there is no

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Linear acceleration

Angular acceleration

Both

None of these

The critical temperature of aluminum is

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1.18 K

4.2 K

3.72 K

7.2 K

A convex lens is dipped in a liquid whose refractive index is equal to the material of the lens. Then its focal length will become

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Infinite

Zero

Extremely small

Extremely large

Angular acceleration is produced in a body by the physical quantity called

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momentum

vibration

torque

centrifugal force

A particle is acted upon by a force of constant magnitude which is always perpendicular to the velocity of particle.the motion of the particle takes place in a horizontal plane.It follows

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Linear momentum is constant

Velocity is constant

It moves in a circular path

None of these

Newton's rings are formed due to

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Refraction of light

Diffraction of light

Interference of light

None of these

The percentage errors in the measurements of mass and speed are 2% and 3% respectively.How much will be the maximum error in the estimate of the kinetic energy obtained by measuring mass and speed.

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11%

8%

5%

1%

Diameter of the nucleus is of the order of

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10^-10m

10^-12m

10^-15m

10^-18m

A railway engine (mass 104 kg) is moving with a speed of 73 km/h.The force which should be applied to bring it to rest over a distance of 20 m is

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3,600 N

7,200 N

10,000 N

100,000 N

Deep water almost runs still when surface water flow in rivers.What does it explains

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Magnus effect

Equation of continuity

Surface energy

Bernoulli's equation

When two axis are drawn at right to each other are called

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Coordinate axes system

Cartesian system

Rectangular coordinate system

All of these

The viscosity of fluid is described by

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Resistive forces of fluid

Frictional effect between different layers of a fluid

Flowing speed of fluid

None of these

The decrease in velocity per unit time is called

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deceleration

acceleration

uniform acceleration

variable acceleration

The gravitational force of earth on a ball of mass one kilogram is 9.8 N. The attraction of ball on the earth is

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9.8 N

Negligible

Slightly less than 9.8 N

More than 9.8 N

If unit of length mass and time each be doubled the unit of work done is increased by

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4 times

6 times

8 times

2 times

Polymeric solids have the properties like

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No definite shape

No definite structure

Partially crystalline solids

All of them

Interference and diffraction of light confirms its:

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Particle nature

Dual nature

Wave nature

Electromagnetic nature

If force and displacement of particle in the direction of force are doubled.Work would be

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Double

4 times

Half

1/4 times

Satellites are held in orbits by gravitational pull by Earth and are put into orbit by

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Initial velocity

Rockets

Escape velocity

None of these

A spring balance is graduated at sea level. If the body is weighted with this balance at consecutively increasing heights form the earth's surface the weight indicated by the balance will

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Go on increasing continuously

Go on decreasing continuously

Remain the same

First increase and then decrease

The velocity of light in vacuum can be changed by changing

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Frequency

Amplitude

Wavelength

None of these

The lower refractive index the fibre core has

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1.48

1.40

1.54

1.42

The law of conservation of momentum says that the total angular momentum of the system remains constant if no external

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Force acts on it

Torque acts on it

Frictional force action it

None of these

If Rx is positive and Ry is negative, the resultant lies the fourth quadrant and its direction is

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θ = 180 + Φ

θ = 360 + Φ

θ = 360 - Φ

None of these

Minimum number of unequal forces whose vector sum can be zero is

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3

4

2

5

N-kg^-1is the unit of

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Velocity

Force

Acceleration

None of these

The horizontal range of projectile, at a certain place, depends upon

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the mass of the projectile

velocity of projection

angle of projection

angel as well as velocity of projection

The dimensions of co-efficient of viscosity are

Choose an answer

[ML^-1T^-1]

[ML^-2T^-1]

[ML²T^-3]

[ML³T^-1]

If the water exists from the pipe at the rate 1.5 kgs^-1 at speed of 0.3 ms^-1. If the water strikes a wall normally, find the force on the wall is

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5.53 N

5.03 N

1.35 N

0.45 N

The product of pressure P and volume V of an ideal gas is

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Constant

Approximately equal to the universal gas constant

Directly proportional to its temperature

Inversely proportional to its temperature

Electron volt is a unit of

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Potential difference

Energy

Charge

Power

Which one is ferromagnetic

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Ferries

Cobalt

Nickel

All

The diameter of an optical fibre with its protective case may be typically

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7.62 cm

67.62 mm

6.0 mm

90 mm

Light appears to travels in straight lines since

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It is not absorbed by the atmosphere

It is reflected by the atmosphere

Its wavelength is very small

Its velocity is very large

One light year is equal to

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9.5 x 10¹⁵m

9.5 x 10¹⁵sec

9.5 x 10¹⁵km

9.5 x 10¹⁵cm

In which process, the change in internal energy of the system of zero:

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Isochoric process

isobaric process

Adiabatic process

Isothermal process

The unit of surface energy per unit area may be expressed as

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Nm^-2

Nm^-1

Nm

Nm²

pgh in Bernoulli's equation has unit of

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Volume

Force

Work/Volume

None of these

A typical diffraction grating has lines per centimeter

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10 to 100

100 to 1000

1000 to 5000

400 to 5000

A body is said to be in a state of complete equilibrium if

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Its translational accelerationis zero

Its rotational acceleration is zero

its rotational as well as translational acceleration is zero

its angular momentum is zero

The direction of velocity is along the direction of

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Motion

Displacement

Velocity

None of these

A tank full of liquid has an orifice 4.9 m below the surface level in the tank, the velocity of out coming liquid is

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4.9 ms^-1

9.8 ms^-1

2 x 9.8 ms^-1

4 x 9.8 ms^-1

An electric fan rotating in 3 revs^-1 is switched off. It come sot rest in 18.0 sec. Find the value of acceleration which is

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+ 1.267 revs^-2

0027 revs^-2

- 0.167 revs^-2

- 0.152 revs^-2

Polarization is a phenomenon in which

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Electric intensity decreases

Potential difference decreases

Charge 'Q' decreases

All of them

When a ray of light enters a denser medium from a rarer medium,its:

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Wavelength increases

Velocity increases

Frequency decreases

Wavelength decreases

In which process the change in internal energy of the system is zero:

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Isochoric process

Isobaric process

Adiabatic process

Isothermal process

The vector product of two non zero vectors is zero when

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They are parallel to each other

They are perpendicular to each other

They are equal vectors

They are inclined at angle of 60°

A copper ball of radius r is moving with a uniform velocity v in the oil. The dragging force acting on the ball is F. The dragging force on the copper ball of radius 2r moving with uniform velocity 2v in the oil is

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F

2F

4F

8F

The study of properties of fluid at rest is called

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Fluid dynamic

Fluid statics

Both a and b

dynamics

The highest efficiency of a heat engine whose lower temperature is 17°C and the high temperature of 200°C is

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70%

100%

35%

38%

In Newton,s rings apparatus, we also use

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Spectroscope

Telescope

Microscope

Turn table

Which equation is used to define resistance

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Energy = (current)²x resistance x time

Potential difference = current x resistance

Power = (current)² x resistance

Resistivity = resistance x area + length

The terminal velocity of a 2 cm radius ball in liquid is 20 cms^{-1. What would be the terminal velocity if the radius of the ball were halved? Keeping the mass constant}

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80 cms^-1

40 cms^-1

20 cms^-1

5 cms^-1

The time constant is the time required to deposit the equilibrium charge

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63 times

36 times

0.63 times

0.36 times

The kinetic energy of a body is four times its momentum its velocity is

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2ms^-1

4ms^-1

8ms^-1

16ms^-1

How the fringe spacing varies as the separation of the slits increases

Choose an answer

Increases

Decreases

Increases very little

None of these

The time taken by the mirror M to rotate through an angle 2π/8 is

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1/8 f

1/16 f

1/4 f

1/2 f

The transition from solid to liquid state is:

Choose an answer

Abrupt

Slow

Continuous

Discontinuous

Both A and D

Choose an answer

r

r²

r³

None of these

The wave nature of light was first proposed by

Choose an answer

Huygen

Thomas Young

Newton

Compton

Rainbow is formed due to combination of

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Dispersion and total internal reflection

Reflection and refraction

Dispersion and focusing

Refection and scattering

The energy of photon of energy 1 eV is:

Choose an answer

1240 nm

1040 nm

1000 nm

620 nm

Choose an answer

If the incident light contains different wavelengths the images of each wavelength for a certain value is diffracted in the

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Same directions

Different direction

Opposite direction

None of these

When an atom is isolated, it energy levels are

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Distinct

Very close

Very very close

None of these

A 4 m long string fixed at its ends resonate in 4 segments. The wavelength of the waveis:

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4m

0.5m

2m

0.25 m

The typical speed of human swimming is

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1.5 ms^-1

2 ms^-1

2.5 ms^-1

3.0 ms^-1

A long solenoid has 20 turns/ cm. The current necessary to produce a magnetic field of 20 mellites inside the solenoid is approximately:

Choose an answer

1A

2A

4A

8A

A precise measurement is the one which has

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Absolute uncertainty

Less absolute uncertainty

More absolute uncertainty

None of these

The energy that flows from a high temperature object to a low temperature object is called

Choose an answer

Heat

Sound

Electricity

Solar energy

A usual way to obtain a plane wave is to place point source of light at the focus of a

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concave lens

convex lens

both of them

either of them

The temperature at which all the gases become liquid is called:

Choose an answer

273 K

-273 K

Absolute Zero

Both (B) and (C)

If momentum is increased by 20% then K.E. increases by

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44%

55%

66%

77%

The direction of angular acceleration is

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Opposite of the axis of rotation

Along the axis of rotation

Perpendicular to the axis of rotation

None of these

Rectangular components of a vector are those which have angle between them

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30^o

60^o

90^o

0^o

The shaft of a motor is rotating at constant angular velocity of 3000 rpm. The angle turned per second is

Choose an answer

100 π rad/s

200 π rad/s

300 π rad/s

400 π rad/s

Two point charges A and B separated by a distance R attract each other with a force of 12 x 10^-3 N.The force between A and B when the charges on them are doubled and distance is halved

Choose an answer

1.92 N

19.2 N

12 N

0.192 N

1 torr is expressed as

Choose an answer

136.5 Nm^-2

13.3 Nm^-2

133.3 Nm^-2

130.5 Nm^-2

The principle characteristics of an ideal standard are

Choose an answer

Inaccessible and invariable

accessible and invariable

Accessible and variable

None of these

A uniform plank of weigth 20 N is 200 cm long and rests on a support that is 60 cm from one end At what distance from that end must an 80 N weight be placed in order to balance the plank

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10 cm

20 cm

40 cm

50 cm

If we increase the distance between two plates of the capacitor the capacitance will

Choose an answer

Increase

Decrease

Remain same

First increase then decrease

A train if 150 m length is going towards north direction at a speed of 10 ms^-1. A parrot flies at a speed of 5 ms^-1 towards south direction parallel to the railway track.The time taken by the parrot to cross the train is equal to

Choose an answer

12 s

8 s

15 s

10 s

Blood vessels are not

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Flexible

Rigid

Some times flexible

None of these

Random error occurs when repeated measurements of the quantity under the same conditions gives

Choose an answer

Equal values

Different values

Increasing values

None of these

The SI unit of stress is same as that of.

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Momentum

Pressure

Force

Length

A non-inverting amplifier has infinite input resistance then the voltage gain of noninverting amplifier will be:

Choose an answer

Zero

Infinite

One

100

A grating with high resolving power can distinguish ______ difference in ______

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Smaller, amplitude

Greater, wavelength

Smaller, wavelength

Greater, intensity

A body moves a distance of 10 m along a straight line under the action of a force of 5 Newton.If the work done is 25 joules. the angle which the force takes with the direction of motion of the body is:

Choose an answer

0°

30°

60°

90°

A regular, repetitive, three-dimensional pattern of points, which represent the position of molecules, atoms or ions in the crystal, is called:

Choose an answer

Unit cell

Space lattice

Crystal

None of these

A negative sign is assigned to quantities where direction is opposite to that of

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final velocity

initial velocity

instantaneous velocity

all of them

The displacement-time graph of a particle is as shown below.It indicates that

Choose an answer

The particle starts with a certain velocity,but the motion is retarded and finally the particle stops

The velocity of the particle is constant throughout

The acceleration of the particle is constant throughout

The particle starts with a velocity the motion is accelerated and finally the particle moves with a constant velocity

The forces which forms a couple

Choose an answer

Can be replaced by a single equivalent force

cannot be replaced by a single equivalent force

Are perpendicular to each other

All of these

The danger signals are red while the eye is more sensitive to yellow because

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Scattering in yellow colour is less than that of red

Red light is longer in wavelength than yellow light

Scattering in red is less than that of in yellow

Red colour has greater frequency than yellow light

The magnitude of torque is equal to the product of the force and the moment arm. The moment arm is

Choose an answer

The distance between the point and the point of the action of the force

The maximum distance between the pint and the line of action of the force

The minimum distance between the pivot point and the line of action of the force

All of these

Two masses of 1 g and 4 g are moving with equal kinetic energies.The ratio of the magnitudes of their linear momenta is:

Choose an answer

4 : 1

√2 : 1

1 : 2

1 : 16

A listener observes the frequency “f” of stationary source. If it move toward with 3 times of velocity of sound. Then the apparent frequency of the sound will be

Choose an answer

f

3f

f/2

4f

Ratio of dimensions of power and K.E is

Choose an answer

1 : 1

T : 1

1 : T

M : T

Choose the correct statement

Choose an answer

Rays are normal to wave front

Rays may be normal to wave front

Rays are not normal to wave front

There is no relationship between rays and wave fronts

In Insulators the conduction band is

Choose an answer

Empty

Partially filled

Full

None of these

The magnifying power of a compound microscope can be increased if we use objective lens of

Choose an answer

Large focal length

Small focal length

Same focal length

None of these

The direction of a vector in a space is specified by

Choose an answer

One angle

Two angles

Three angles

Cannot be specified

The burnt gas expelled from the rocket engine with

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High velocity

Extremely high velocity

Very high velocity

None of these

In CGS system the units of dynamic viscosity are

Choose an answer

Nsm^-2

Poise

Nm^-2

None of these

The example of vector product is

Choose an answer

Torque

Tangential velocity

Angular momentum

All of these

The lift of Aero plane based on

Choose an answer

Law of gravitation

Bernoulli's theorem

Torricelli's theorem

Law of conservation of momentum

The motion of planets in the solar system is an example of the conservation of:

Choose an answer

Mass

Linear momentum

Angular momentum

Energy

Earth-sun travel around the galaxy is

Choose an answer

220000 ms^-1

230000 ms^-1

210000 ms^-1

200000 ms^-1

The magnetism produced by electrons within an atom can arise from

Choose an answer

electrons orbiting the nucleus

both motions

none one these motions

A convex lens of focal length 5 cm is used as magnifying glass Its magnifying power when the image is formed at infinity

Choose an answer

6

5

1.5

7

The locus of all the points in the same phase of vibration is called:

Choose an answer

Wave packet

Wavefront

Wave number

None of these

Viscosity of water at 30^oC in Nsm^-2

Choose an answer

0.521 × 10^-3

0.564 × 10^-3

0.594 × 10^-3

0.599 × 10^-3

The synchronous satellites are very useful for

Choose an answer

Worldwide communicatioin

Weather observations

Navigation

All of these

The Permitivity ε_o of free space has the value in S.I. units is

Choose an answer

8.85 × 10^-10 C² N^-1 m^-2

8.85 × 10^-11 C² N^-1 m^-2

8.85 × 10^-12 C² N^-1 m^-2

8.85 × 10^-13 C² N^-1 m^-2

Time of flight of a body in projectile is the time in which a body

Choose an answer

Remains in the air

It reaches maximum height

The velocity becomes zero

None of these

A body will be in translational equilibrium, if

Choose an answer

A fly is sitting on the objective of a telescope pointed towards the moons what effect is impacted in a photograph of the moon taken through the telescope

Choose an answer

The entire field of vision is blocked

There is image of the fly on the photograph

There is no effect at all

There is the reduction in intensity of the image

The idea that all magnetic effects may be due to circulating currents (i.e moving charges) Was first held by

Choose an answer

Ampere

Faraday

Lenz

Gauss

A change in position of a body from its initial position to its final position is known as

Choose an answer

relative motion

displacement

distance

acceleration

The flow is said to be streamline or lamina when every particle

Choose an answer

Moves in different direction

Moves along the same path as

Slowly moves in one direction

None of these

A ball whose kinetic energy is E,is thrown at an angle of 45° with the horizontal.its kinetic energy at the highest point of its flight will be

Choose an answer

E

F/√2

E/2

Zero

For a fixed force, larger is the mass of a body, the

Choose an answer

greater is its acceleration

smaller is its acceleration

smaller is its weight

zero is its acceleration

Unit of impulse in

Choose an answer

Newton

Kg m

Kg m/s

Joule

Two equal forces (P each) act at a point inclined to each other at an angle of 120°.The magnitude of their resultant is

Choose an answer

P/2

P/4

P

2P

If two ping pong balls are suspended near each other and a fast stream of air is produced in the space between the balls, then the balls.

Choose an answer

Come closer

Move farther

Remain in original position

Fall down

In photoelectric effect, if we increase the frequency of the incident light then of the electrons increased

Choose an answer

Number

K.E

P.E

Frequency

Hotness or coldness of an object is expressed in terms of a quantity called

Choose an answer

Heat

Temperature

Kelvin

None of these

Which of the following is equal to:

joule x ohm /volt x second?

Choose an answer

Ampere

Volt

Watt

Tesla

Bulk modulus is involved when the deformation is:

Choose an answer

One dimentional

Two dimentional

Three dimentional

Any of these

None of these

When a constant force is applied on a body it moves with uniform

Choose an answer

Acceleration

Velocity

Speed

Momentum

The ratio of tensile stress to tensile strain is

Choose an answer

Force

Young's modulus

Bulk modulus

Shear modulus

Shear modulus for lead is

Choose an answer

1.7

4.9

5.6

6.2

The smallest part of a crystal lattice is called:

Choose an answer

A molecule

An atom

A unit cell

A particle

At terminal velocity the net force acting on it is

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Maximum

Minimum

Zero

None of these

Equal vectors are said to be equal if by have

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Same magnitude and direction

Same magnitude and opposite

No position of initial points

Direction a and b

In coordinate axes the right ward forces are taken as

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Positive

Negative

Just units only

None of these

A boat of mass 40 kg os at rest.A dog of mass 4 kg moves in the boat with a velocity of 10 m/s.What is the velocity of boat?

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4 m/s

2 m/s

8 m/s

1 m/s

Propagation of light in an optical fibre requires

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Total internal reflection

Continuous refraction

Both

None of these

The energy gap between conduction band and valence band is semiconductor is

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A very narrow forbidden energy gap

A narrow forbidden gap

Of the order of 1 eV

a and b

A shortsighted person can see clearly

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Near objects

Far objects

Objects at 25 cm

Objects at infinity

The minimum energy required by an electron to eject from metal surface is known as:

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Photo energy

Critical energy

Threshold energy

Work function

If (a x b) points along positive z-axis,then the vectors a and b must lie in.

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yz-plane

zx-plane

xy-plane

None of the above

The final image obtained by astronomical telescope is

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Inverted w.r.t object

Magnified

Virtual

All of them

The value of shear modulus is zero for:

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Water

Mercury

Diamond

Both (A) and (B)

Both (A) and (C)

In deriving Bernoulli's equation, it is assumed that the fluid is

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Incompressible

Non-viscous

In a steady state

All of these

The escape velocity of Venus in Kms^-1

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5.28

8.24

10.02

10.4

The velocity of falling raindrops attains limited value because of

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Up thrust of air

Air currents of the earth atmosphere

Surface tension effect

Viscous force exerted by air

A diesel engine converts heat energy into work by

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35%

40%

35% to 40%

45%

Inspite vibrations the force which hold the atoms in their ordered form is

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Vander vall force

Cohesive force

Adhesive force

None of these

A line whose tangent at each point is in the direction of an electric intensity at that point is called

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Charge

Voltage

Electric force

None of these

If the slits in YDS experiment are made closer, fringe spacing will

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Increase

Decrease

Remain same

None of these