Question # 1

Significant figures in 0.000546

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1

4

3

5

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

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Calorimeter

Heat engine

thermometer

Voltmeter

Efficiency of a heat engine working between 27 ^oC and 32 ^oC will be.

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50%

90%

40%

62%

Change of momentum is equal to

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Force

Tension

Impulse

Pressure

A gas performs 10 J of work while expanding adiabatically. the change in its internal energy is.

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10 J

-10 J

100 J

-200 J

Opted unit to measure blood pressure is.

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N/m2

Pascal

mm of Hg

N.m2

A ball is thrown up with 20 ms-1 at an angle of 60 ^owith x-axis , the velocity of the ball at the top position is.

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0 ms-1

10 ms-1

20 ms-1

16 ms-1

The horizontal component of velocity of projectile

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Increases

Decreases

Remain same

Decreases and then increases

A force of 20 N acts along x axis, tis component is.

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0 N

10 N

20 N

30 N

When a particle is moving along a circular path its projection along the diameter executes

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Linear motion

Vibratory motion

Rotatory motion

SHM

Boltzman constant 'k' has same unit as.

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Temperature

Energy

Entropy

Pressure

The dimension of pgh has same as that of

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Work

Energy

Pressure

Mass

Young in 1801 performed experiment for the first time about

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Interference

Diffraction

Polarization

Particle nature of light

If 332 waves pass through a medium in 1 second with speed of 332 ms-1 then wavelength will be

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7 m

332 m

664 m

1 m

The SI Unit of amount of substance is

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Mole

Joule

Volt

Ohm

When temperature of source and sink of a heat engine becomes equal then the entropy change will be.

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zero

Minimum

Maximum

Negative

A layer of rock holding water that allows water to percolate through it with pressure is called.

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Geyeser

Aquifer

Stem vent

Hot spring

By increasing the amount of stretch in spring the force exerted will

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Increase

One watt

One erg

One joule

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