Question # 1

the change in internal energy is defined as

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Q - W

Q-T

Q + P

Q - P

Carnot cycle consists of.

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Two steps

Three steps

Four steps

Five steps

The speed of sound in ari at 0 ^oC is 332 ms-1, Then the speed at 40 ^oC will be

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372 ms-1

356 ms-1

346 ms-1

332 ms-1

In stationary waves, the particle velocity at nodes is

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Minimum

Maximum

Zero

Constant

In stationary waves, the velocity of particle at the node is.

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Maximum

Infinite

Zero

Varible

Unite of thermodynamics scale of temperature is.

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Centigrade

Fahrenheit

Kelvin

Celsius

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

The efficiency of any heat engine can never be

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+ve

100%

-ve

None of these

A body covers a distance of 10 m in 1 sec with a constant velocity of 10 ms-1 , Acceleration produced by the body is.

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0 ms-1

2 ms-2

5 ms-2

10 ms-2

Longitudinal waves do not exhibit

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Reflection

Refraction

Polarization

Diffraction

The terminal velocity of a droplet falling down under gravity is directly proportional to the square of

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Its density

Its radius

Its viscosity

Its elasticity

the systolic pressure of normal healthy person is.

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120 torr

130 torr

115 torr

110 torr

The unit o pressure of gas is

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Nm^-2

Pascal

Atmosphere

All of these

Energy dissipated usually appears as

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P.E.

Heat Energy

Chemical energy

Nuclear Energy

The rate of change of momentum is equal to

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Impulse

Torque

Velocity

Force

The state of human blood flow can be found by using.

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Newton's formula of speed of sound

Interference of sound

Phenomena of beats

Doppler's effect of sound

The energy processes, we use are

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Efficient

Not efficient

Reversible

None of these

The frequency of 2nd pendulum is

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0.5 Hz

1 Hz

1.5 Hz

2 Hz

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