All India Engineering / Architecture Entrance Examination (AIEEE)

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AIEEE 2010 Physics

Q.15. A diatomic ideal gas is used in a Carnot engine as the working substance. If during the adiabatic expansion part of the cycle the volume of the gas increases from V to 32 V, the efficiency of the engine is

1. 0.5
2. 0.75
3. 0.99
4. 0.25
   

Sol:

Answer : (2)

Q.16. If a source of power 4 kW produces photons/second, the radiation belongs to a part of the spectrum called

1. X-rays
2. ultraviolet rays
3. microwaves
4. -rays

Sol:

Answer : (1)

Q.17. The respective number of significant figures for the numbers 23.023, 0.0003 and are

1. 5, 1, 2
2. 5, 1, 5
3. 5, 5, 2
4. 4, 4, 2

Answer : (1)

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