Question # 1

Transformation of heat other forms of energy is discussed in

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Thermal physics

Thermodynamics

Atomic physics

Nuclear physics

Which quantity of the following is dimensionless.

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Angular velocity

Centripetal force

Angular acceleration

Angular displacement

Stars moving away from Earth show a

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Green shift

Blue shift

Red shift

Yellow shift

In blue light is used as compare to red light then fringe spacing.

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Increase

Decreases

Remain same

Becomes zero

Michelson's interferometer can be used ot find the

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Velocity of light

Wavelength of light

Velocity of sound

Wavelength of sound

When a fore of 100 N is acting on an object along x-axis then its vertical component will be.

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50 N

0 N

25 N

10 N

The internal energy of a piece of lead when beaten by hammer will.

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Increase

Decrease

Remains constant

Increases and then decrease

A diatomic gas molecules has

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Translational energy only

Rotational energy only

Vibrational energy only

All translational, Rotational and vibrational energy

For maximum range the angle of projection must be

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30^o

45^o

60^o

90^o

At which of the following temperature a body has maximum internal energy.

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-273 ^oC

0 K

273 K

-273 K

The distance between two consecutive wave front is equal to

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One wave length

Two wave length

Half wave length

Three wave length

A Carnot engine has an efficiency of 50% when its sink temperature is at 27 ^oC. The temperature of source.

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273^oC

300 ^oC

327 ^oC

373 ^oC

Direction of angular acceleration is always along

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x-axis

y -axis

z-axis

The axis of rotation

An immediate source of energy for our body is:

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mango

Glucose

mushroom

meat

The product of rotational inertial 'I' and angular velocity ' w' is equal to.

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Torque

Linear momentum

Angular momentum

Force

Which of the following is not directed along the fixed axis of rotation.

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Angular displacement

Angular momentum

Centripetal acceleration

Angular acceleration

A typical diffraction grating has certain number of lines per centimeter whose range is.

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40 to 50

400 to 5000

400 to 500

4000 to 5000

Usually the x-axis is taken as

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Vertical axis

Horizontal axis

+ve axis

-ve axis

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