Question # 1

Pressure 'P' of a gas is defined as

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F/A

FA

F/V

F/D

The efficiency of a Carnot Heat Engine is 100% if temperature of sink T2 is.

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0 ^oC

0 K

0 ^oF

100 K

A system does 600 J of work and at the same time has its internal energy increased by 320 J. How much heat has been supplied.

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28o J

920 J

600 J

200 J

Transformation of heat other forms of energy is discussed in

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Thermal physics

Thermodynamics

Atomic physics

Nuclear physics

The curve representing an adiabatic process is called.

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An adiabatic

An isotherm

Both of these

None of these

Entropy remains constant.

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Isothermal process

Adiabatic process

Isochoric process

Isobaric process

The difference between two molar capacities is equal to.

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Plank's constant

General gas constant

Molar gas constant

Boltzmann constant

Carnot cycle consists of.

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Two steps

Three steps

Four steps

Five steps

The temperature of human body on Kelvin scale is

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210K

310K

410K

510K

The molecules of an ideal gas exert

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Force on each other

No force on each other

Large force on each other

Pressure on each other

The efficiency of diesel engine is about

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25% to 30%

35% to 40%

40% to 50%

50% to 60%

In reversible process the entropy of system.

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Remain constant

Decrease

Increase

Becomes zero

A finite volume of gas consists of

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Small no. of molecules

Large no. of molecule

Average no. of molecule

None of these

Which is an example of irreversible process.

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Explosion

Evaporation

Slow compression

A chemical explosion

The number of spark plug needed in diesel engine is

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0

2

3

4

The measure of hotness or coldness of a substance is.

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Temperature

Heat

Internal energy

Energy

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

During adiabatic process, which factor remains constant.

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Entropy

Pressure

Momentum

Power

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Physics ICS Part 1 Chapter 11 Online Test MCQs With Answers

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