Physics MCQs

Page No. 2

The unit of entropy is________________?J.K


aJ.K

✓


b J/K

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cN.m/sec

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dKgm2/sec2.K

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View Answer J.K

Which quantity is a state function_______________?


ainternal energy

✓


bheat supply

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c pressure

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d volume

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View Answer internal energy

Petrol engine is a________________?


a C.I engine

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bSI engine

✖


c IC engine

✖


d all the above

✓


View Answer all the above

The purpose of flywheel in the engines is________________?


ato smooth out the energy variation

✓


b to add more weight to engine to work it stable

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c to start engine

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d both A and B

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For the successful operation of Heat engine which condition should be met ?


acyclic process

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boperated at certain temperature difference

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cboth A and B

✓


dnone of these

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View Answer both A and B

The work done in the isochoric process is________________?


aconstant

✖


bvariable

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czero

✓


ddepends on situation

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View Answer zero

Adiabatic process is also called______________?


aHeat exchange process

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bHeating process

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cIsentropic process

✓


dAll of the above

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View Answer Isentropic process

In which process entropy remains constant________________?


aisobaric

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b isochoric

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cadiabatic

✓


d isothermal

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View Answer adiabatic

Average translational kinetic energy per molecule of an ideal gas is given by_____________?


a3NaT/2R

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b 2NaT/3

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c3RT/2Na

✓


d3Na/2RT

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View Answer 3RT/2Na

Boltzman constant K in terms of universal gas constant R and Avagadros number Na is give as_______________?


aK = RNa

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bK = R/Na

✓


cK = Na/Ra

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dK = nRNa

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View Answer K = R/Na

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