Question # 1

First law of thermodynamics can be defined by the equation

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Unite of thermodynamics scale of temperature is.

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Centigrade

Fahrenheit

Kelvin

Celsius

No of spark plugs needed in the diesel engine are.

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0

1

2

3

Which one is true for isothermal process.

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Q = 0

W = 0

Q = W(D) Delta U = 0

None of these

Force acting on the piston to move outward is.

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Compressive stoke

Power stoke

All stoke

Exhaust stoke

the change in internal energy is defined as

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Q - W

Q-T

Q + P

Q - P

An ideal reversible heat engine has

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100% efficiency

Highest efficiency

80%

90%

Which is the process in which temperature of the system remains constant.

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Adiabatic process

Isochoric process

Isothermal process

Isobaric process

The kinetic energy of molecules of an ideal gas at absolute zero is

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Very low

Very high

Zero

First increases then decreases

Size of the molecules is much smaller as compared to the

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Mass of the molecules

Distance between the molecules

Density of the molecules

Volume of the molecules

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

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50%

90%

40%

62%

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Physics English Medium Fsc Part 1 Chapter 11 Online MCQs Test MCQs With Answers

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