Question # 1

The formula for the power is

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P= W/d

P=W/v

P=W/t

P=Wt

With increase of temperature, speed of sound.

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Remains constant

Becomes zero

Decreases

Increases

Which quantity of the following is dimensionless.

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Angular velocity

Centripetal force

Angular acceleration

Angular displacement

The error is constant for ............error

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Random

Systematic

Both a and b

All

The motion and rest are

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Absolute

Relative

Mutual

All of these

When two waves of same frequency travel in opposite direction, the phenomenon will be

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Diffraction

Stationary waves

Polarization

Interference

A communication satellite is used ot reflect the signal of.

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Microwaves

Radio waves

y rays

x -rays

Change of momentum is equal to

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Force

Tension

Impulse

Pressure

Newton's laws of motion were published in

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1587

1687

1787

1887

10 waves pass through a point in 2 seconds with speed 10 ms-1 the frequency of wave will be

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1 Hz

2 Hz

5 Hz

10 Hz

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

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Torque

Linear momentum

Angular momentum

Force

The lower reading of blood pressure is called.

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Systolic pressure

Diastolic pressure

Normal pressure

Non normal pressure

1 torr in Nm-2 is expressed as.

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130.5 Nm-2

133.3 N m-2

140.2 Nm-2

135.2 Nm-2

Not change in entropy of a system after one complete Carnot cycle is.

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Positive

Negative

Zero

None of these

Second pendulum has a time period

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1 sec

3 sec

2 sec

4 sec

If heat is added to a system, then its entropy will.

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Increases and positive

Decrease and positive

Increases but negative

Decreases but negative

A device based upon the thermodynamics property of matter is called.

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Calorimeter

Heat engine

thermometer

Voltmeter

The pitch of sound deepens upon

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Intensity of sound

Loudness of sound

Wavelength of sound

Frequency of sound

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