Question # 1

Motion of a screw of rotating fan is

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Circular Motion

Vibratory motion

Rotatory motion

Random Motion

An object of mass 1 kg placed at earth's surface experience a force of.

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1 N

9.8 N

100 N

Any Value

The numerical ratio of displacemnt o distance is

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Equal to or less than one

Always greater than one

Always equal to one

Always less than one

When using a mwasring cylinder one preceution to take is to.

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Check for the zero

Position the eye in line with the bottom of the meniscus

Look at the menscus from below the level of the water surface

Take several readings by looking from more than one direction

A body accelerates from rest to a velocity of 144 km h-1 in 20 seconds. The the distance covered by it is.

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100 m

1400 m

400 m

1440 m

Which of following prefeix represents largest value.

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Pico

Peta

Mega

Kilo

A car is moving with velocity of 10 m/s . If it has acceleration of 2 m/s2 for 10 seconds. What is final vlocity of the car.

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20 m/s

10 m/s

30 m/s

15 m/s

The number of significant figuresin 0.00650 s are

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2

3

5

6

Two rods with length 12.321vm snf 10.3 cm are placed side by side. the difference is their lengths is.

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2.02 cm

2 cm

2.021 cm

2.0 cm

A force acts on a boyd for 2 seconds and it produces 50 kg m/s chagne in its momentum. The force acting on the body

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25 N

100 N

2 N

50 N

A particle of mass m moving with a velocity v collides with another particle of the same mass at rest. The velocity of the first particle after collision is.

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0

v

-p

- 1/2

Gradient of the distance -time graph is equal to the

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Distance covered

Acceleration

Speed

Velocity

Which of the following numbers show 4 significant digits.

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9000.8

4

0.001248

5174.00

SI unti of linear momentum is

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kgm-1 s-1

kg m s-1

kg m2 s-1

Nm

Slope of distance-time graph is.

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Speed

Velocity

Acceleration

Displacement

At the fairground, the force that balances your weight is

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Gravitatinal force

Electrostatic force

Centripetal force

Frictional force

One femtometre is equl to

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10^-15 m

10¹⁵m

10^-9m

10⁹m

A bucket having some water is revolved in vertical circle. Water does not spill out, even the bucket is upside down, due to.

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Centrifugal force on water

Weight of water

Inertial of water

Action and Reaction balance each other

At mean position of pendulum, the potential energy of the pendulum is:

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Maximum

Minimum

Much more

Both a and c

George Boole invented:

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Boolean algebra

Arithmetic algebra

Mean algebra

Geometry

A dielectric must be:

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Resistor

Insulator

Good conductor

Semi conductor

Radio waves are:

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Electric waves

Electromagnetic waves

X-rays

Radio active ways.

Waves transfer:

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Energy

Wavelength

Velocity

frequency

the substance in which electric current flows easily is called:

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transistor

semi conductor

insulator

conductor

The substances which do not have free electrons are called:

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None of these

Insulators

Conductors

Semiconductors

The motion in which the friction reduces the mechanical energy of the system as times passes and the amplitude of motion reduces is called:

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SHM

Randum motion

Damped motion

None of these

The line which passes through pole of the mirror and center of curvature is called principal:

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axis

Focus

Line

None of these

Thermocouples convert:

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Heat energy into electrical energy

Heat energy into light energy

Heat energy into mechanical energy

Chemical energy into electrical energy

The speed of sound in the air at one atmospheric pressure at room temperature is:

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343 ms-1

346 ms-1

349 ms-1

339 ms-1

If a neutral body is brought near to the electroscope its leaves:

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Diverge

Contract

Shut

Remain in normal position

The presence of a magnetic field can be detected by a

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small mass

Stationary positive charge

Stationary negative charge

Magnetic compass

The time required to complete one round trip (vibration) abut mena position is called:

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Time period

Freqency

Amplitude

None of these

Time period is reciprocal of:

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Frequency

Cycle

Wavelength

Amplitude

The screen of a cathode ray tube consists of a thin layer of:

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Sodium

Nitrogen

Oxygen

Phosphorus

One micro coulomb charge is equal to:

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10^-3c

10³c

10⁶c

10^-6c

The more negative potential of grid, the more electrons will be:

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Attracted

Repelled

Attracted as well as repelled

Neither attracted nor repelled

The value of angular momentum is maximum when 0 is

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90^o

60^o

75^o

45^o

In the absence of external force, the change in momentum is.

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Zero

Constant

Decreasing

Increasing

If velocity time graph is parallel to time axis, then acceleration of moving body will be.

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Maximum

Positive

Zero

Negative

Two quantities involved in work are

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Force and speed

Force and velocity

Force and displacement

Force and acceleration

The terminal velocity can be obtained by using

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Newton's law

Stock's law

Guass's law

None of these

the wavelength of transverse wave travelling with a speed 'v' having frequency 'f' in equal to

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f/v

Vf

V/f

f/V2

Which is the process in which temperature of the system remains constant.

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Adiabatic process

Isochoric process

Isothermal process

Isobaric process

Which of the following is the derived quantity.

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Time

Length

Area

Mass

X-ray diffraction has been very useful in determining the structure of

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Hemoglobin

Stars

Galaxies

Stones

An athlete runs with a speed of 12 ms-1. Determine the longest jump he can undertake.

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12 m

14.4 m

24 m

16.2 m

A swing is good example of

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Resonance

Vibration

Time period

Oscillation

Temperature of a gas is increased from 27 oC to 127 oC. The ratio of its mean K.E. will be

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3/4

9/16

4/3

10/9

The unsteady flow of a fluid is called

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Stream line

Turbulent flow

Average flow

Viscous flow

Height of geo stationary orbit of the satellite above the earth is.

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300 km

250 km

400 km

None of these

Before the launch of a rocket the mass of fuel of the rocket is approximately consists of.

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60%

50%

80%

100%

the angular version of F= ma is

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L = 1w

pi = 1a

l = pi a

f = mv/t

If the slope of a velocity time graph gradually decreases than body is said to be moving with

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Positive acceleration

Negative acceleration

Uniform velocity

None

When a body moves in circular motion, the angle between linear and angular velocity is.

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180^o

90^o

60^o

75.3^o

Heat generated by a 40 W bulb in one hour is.

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140 J

1440 J

14400 J

144000 J

The mutual inductance between two coils depends upon their

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Size

Core material

Size, core material and separation

Separation

Main reason for world wide use of A.C. is

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It is cheaper

Transmitted

Botha a and b

Reaches in short time

The background radiation to which we are exposed, on the average is.

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1 mSv per year

2 mSv per year

3 mSv per year

4 mSv per year

Energy produced due to fission of uranium atom is:

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500MeV

200MeV

700MeV

750MEV

An electron moves at 2 x 10² m/sec perpendicular to magnetic field of 2T what is the magnitude of magnetic force:

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1 x 10^-6 N

6.4 x 10^-17 N

3.6 x 10^-24 N

4 x 10⁶ N

A substance having the negative temperature co efficient of resistivity out of the following is.

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Carbon

Iron

Tungsten

Gold

The slope of q-t curve at any instant of time gives.

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Voltage

Current

Charge

Botha a and b

The first atomic reactor was introduced by

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Currie

Enrico Fermi

Newton

Bohr

Which of the following does not undergo plastic deformation.

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Copper

Wrought iron

Head

Glass

At high frequency, the current through a capacitor is

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Small

Infinity

Zero

Large

Magnetic induction can be measured in units of.

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Tesla

Gauss

Weber/m2

All of the above

Torque is produced in a current carrying coil when it is placed in a

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Magnetic field

Electric field

Gravitational field

Nuclear field

Identify the practical application of electrostatic force.

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Inkjet printer

x rays

Laser

A.C. Generator

Maximum Compton shift is observed at.

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30^oC

90^oC

45^oC

180^oC

Brightness of screen of CRO controlled by

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Grid

Filament

Anode

Cathode

The net charge on a capacitor magnitude of charge of charge

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Infinity

2 q

Q/2

Zero

The amount of energy equal to 1.6 x 10^-18 J is called.

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One volt

One milli volt

One electron volt

One mega electron volt