Question # 1

Fluid friction of a spherical body depend on the

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Shape

Size

Orientation

All of these

A charge is situated at the centre of cube. The electric flux through one of the faces of the cube is

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Q/∈_o

Q/2∈_o

Q/4∈_o

Q/6∈_o

Two forces are such that the sum of their magnitudes is 18 N and their resultant is perpendicular to the smaller forces and the magnitude of resultant is 12.Then the magnitude of the forces are

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12 N,6 N

13 N,5 N

10 N,8 N

16 N,2 N

If the focal length of objective is 10 mm find its magnification

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18

19

20

21

The ratio of linear stress/linear strain is called as

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Young's modulus

Bulk modulus

Shear modulus

Modulus

A precise measurement is the one which has

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Absolute uncertainty

Less absolute uncertainty

More absolute uncertainty

None of these

An object is placed between two parallel mirrors the number of images formed is

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2

4

8

Infinite

A 50 kg man is falling freely force acting on it will be

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5 N

50 N

500 N

zero

For average velocity of a body, it has

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Straight path

Curved path

Steady motion or variable

All of them

At terminal velocity the net force acting on it is

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Maximum

Minimum

Zero

None of these

In deriving Bernoulli s equation we assume that the fluid is

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Incompressible

Non-viscous

In steady flow

All of these

Multimode graded index fibre core has diameter of

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40-200 μm

50-1000 μm

50-150 μm

50-300 μm

Bulk modulus for mercury is

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27

29

29.4

30

The valence energy band can never be

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Filled

Partially filled

Empty

None of these

A typical rocket ejects the burnt gases at speeds over

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400 ms^-1

40000 ms^-1

40000m s^-1

60000 ms^-1

The volume of liquid flowing per second out of an orifice at the bottom of a tank does not depend upon

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The area of the orifice

The height of liquid above the orifice

The density of liquid

Both A and C

Distance covered by a freely falling body in 2s will be

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4.9 m

19.6 m

29.2 m

44.1 m

The maximum value of plane angle is

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2π radian

360°

One revolution

All of these

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

A chocolate cookie is a circular disk of diameter 8.5 ± 0.02 cm and thicknes 0.050 ± 0.005 cm the average volume in cm³ is

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2.83 ± 0.3

2.38 ± 0.27

11.35 ± 1.2

9.31 ± 1.12

The perpendicular distance from the axis of rotation to the line of the action of force is called

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Linear distance

Angular distance

Momentum arm

None of these

An ECG records the electric process in heart between

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Points on human skin

Two limbs of human foot

Two lungs of human

None of these

The velocity-time graph of a car is a straight line which rises the same height for equal intervals of time, if it moves with

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zero velocity

constant velocity

zero acceleration

constant acceleration

The relative permitivity for vacuum is

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1

2

1.002

1.004

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

A ball is thrown with a speed of 30 ms^-1_{in a direction of 30}° with the ground. What will be its time of flight?

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3.1 s

1.55 s

0.31 s

15.5 s

A normal to the waves front showing direction of propagating of wave is called

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Photon

Particle

Ray

Line

Direction of torque can be found out by

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head to tail rule

parallelogram rule

left hand rule

right hand rule

Who proposed wave theory of light

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Huygens

Galileo

Einstein

Newton

The speed of a falcon in a dive is

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23 ms^-1

37 ms^-1

40 ms^-1

43 ms^-1

A _____ lens is used in the apparatus to get newton's ring:

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Plano-concave

Plano-convex

Convexo concave

Double covex

Inertial frame of references are those frame of references which are moving with

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increasing velocity

decreasing velocity

constant velocity

all of them

Flux coming out from a unit positive charge placed in air is

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ε_°

ε_°^-1

(4πε_°)^-1

4πε_°

If band gap between valence and conduction band material is 5 eV. The material is

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Insulator

Good conductor

Semiconductor

Such material are not exist

A ball of mass m moving with uniform speed collides elastically with another stationary ball.The incident ball will lose maximum kinetic energy when mass of the stationary ball is:

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m

2 m

4 m

Infinity

A light and a heavy body have equal momentum which one has greater kinetic energy

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Light body

Both has equal K.E

Heavy body

Cannot predict

In case of point source of light, shape of wavefront is:

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Spherical

Cylindrical

Plane

None of these

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

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1A

2A

4A

8A

If focal length of objective is increased

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Magnifying power of compound microscope decreased

Magnifying power of astronomical telescope increases

The diameter of the objective lens

None of these

How is the interference pattern in Young's double slit experiment affected if the sodium light is replaced by red light of the same intensity

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The fringes will vanish

The fringes will become brighter

The fringes will increase

The fringes will decrease

The ability of the body to return to its original shape is called

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deformation

stretching

compressing

elasticity

The angular momentum of a body is conserved if

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Force acting on it is zero

Torque acting on it is zero

Force acting on it is constant

Torque acting on it is constant

Earth-Sun travel around the galaxy is

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220000 ms^-1

230000 ms^-1

210000 ms^-1

200000 ms^-1