Question # 1

The mean kinetic energy of gas is at.

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0 ^oC

-273 ^oC

100 K

100 ^oC

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

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Zero

Constant

Decreasing

Increasing

Rate of change of velocity is called

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Speed

Acceleration

Displacement

Torque

If the tension a stretched string is made four times then the velocity of wave.

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Remains same

Is halved

Becomes twice

Becomes 4 times

Bio mass is converted into fuel by

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Evaporation

Fermentation

Reflection

Scattering

The direction of null vector can be

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(+) ve

(-) ve

Arbitrary

Zero

In rotational motion the torque is equal to rate of change of

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Angular velocity

Linear momentum

Angular momentum

Angular acceleration

In the thermodynamics process , the equation W = -delta U represents.

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Isothermal expension

Isothermal compression

Adiabatic expansion

Adiabatic compression

Teh speed of sound in air is 340 m/s. If the pressure of air is doubled then the speed becomes.

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Double

Half

Four times

Remains same

The wavelength of X-rays is of the order of.

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10^-8 m

10^-10m

10^-5m

10^-4m

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

If amplitude of a simple pendulum is increased by 4 times the time period will be.

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Four times

Half

Same

Two times

The path followed by a projectile in known as its

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Range

Trajectory

Cycle

Height

When two identical waves superimposed, which can change.

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Wave length

Frequency

Velocity

Amplitude

INTELSAT VI satellite operates at microwave frequencies of.

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2,4,6,10 GHz

4,6,11 and 14 MHz

4,6,11 and 14 GHz

2,4,6 AND 14 GHz

One foot is equal to

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31.90 cm

30.48 cm

30.84 cm

84.30 cm

As we go from pole to equator of earth, the value of 'g'

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Increase

Decrease

Remain constant

Zero

Which of the following is mechanical wave

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Heat

Light

Sound

None of these

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