Question # 1

The dimensional of potential energy per unit volume are same as that of.

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Work

Pressure

Speed

Density

When two identical travelling waves are superimposed, velocity of resultant wave.

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Decreases

Increases

Remain same

Becomes zero

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

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Positive

Negative

Zero

None of these

Direction of angular acceleration is always along

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x-axis

y -axis

z-axis

The axis of rotation

The distance between two consecutive crests of troughs is called

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Time period

Wave length

Frequency

Displacement

the distance covered during one vibration of an oscillating body in terms of amplitude 'A' is

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A/2

A

2A

4A

Opted unit to measure blood pressure is.

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N/m2

Pascal

mm of Hg

N.m2

Weight of a 60 kg man in moving elevator with constant acceleration of 1/2 f

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Zero

300 N

600 N

200 N

The distance between the consecutive nodes is

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A mass of 1 kg is freely falling. The force of gravity is.

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1 N

9.8 N

0.5 N

Zero

3 Joules of work id done is 3 seconds, then power

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6 Watt

1 Watt

3 Watt

2 Watt

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

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Diffraction

Stationary waves

Polarization

Interference

The speed of sound increases with the increase of in

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Pressure

Volume

Temperature

Density

Pressure of fluid will be low where speed of fluid is.

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Low

Zero

High

Constant

If focal length of objective and eye piece is 0.5 m and 10 cm respectively then magnifying power of telescope will be.

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0.5

5

10

20

Angular displacement is

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Scalar quantity

Vector quantity

Basic quantity

None of these

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

The SI unit of work is

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Newton

Joule

Mol

Calorie

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