Physics Practice MCQ Page 28
Multiple Choice questions for Physics in the sets of 10 each on one page with questions and answers. All sets are useful in the preparation of subject tests for employment or admission.
Question: 3506 The velocity of the wave could be increased by
- reducing the amplitude
- decreasing the frequency
- increasing the period
- stretching the spring more
Question: 3507 In an organ pipe closed at one end, only the odd harmonics are excited
- true
- false
- uncertain
- non of these
Question: 3508 We know that the work done in an isothermal expansion of a gas depends upon
- Neither temperature nor expansion ratio
- Both temperature and expansion ratio
- Expansion ratio only
- Temperature
Question: 3509 At a given temperature, the mass of the gas in a given vessel is increased. The pressure of the gas increase. This increase is due to
- increase in change in momentum only
- increases in frequency of collision only
- Both due to increase in change in momentum and frequency of collision
- Neither to increase in change in momentum nor to frequency of collision
Question: 3510 for a perfect gas, whose molecules have n degree of freedom, the ratio of specific neat at constant pressure and specific heat at constant volume is
- 1-n
- 1+n
- 1+2/n
- n
Question: 3511 The mean free path is
- inversily proportional to the pressure
- directly proportional to the pressure
- proportional to P2
- proportional to P4
Question: 3512 We know the second law of the thermodynamic implies that
- no heat engine can be 1005 efficient
- whole of the heat can be converted into mechanical energy
- a refrigerator can reduce the temperature to absolute zero
- all are true
Question: 3513 We know the temperature, below which a gas should be cooled before it can be liquefied by pressure only, is termed as
- the critical point
- the saturation point
- the dew point
- the freezing point
Question: 3514 Heat cannot be transfered from a colder to a hotter body unless work is done. this is a statement of
- first law of thermodynamics
- efficiency of a heat engine
- secod law of thermodynamics
- adiabatic pocess
Question: 3515 Two reversible engines A and B have their sources at 800 K and 640 K. Their sinks are at 400 K and 300 K respectively
- A is more efficient than B
- A is less efficient than B
- They are equally efficient
- their efficiencies depend only upon the type of fuels used
Question: 3516 The specific heats of solids at low temperature can be determined
- by the method of mixture
- by Nernest's Vacuum calorimeter
- by Bomb's calorimeter
- by Bunsen's ice calorimeter
Question: 3517 Monochromatic green light has a wavelength of 520 nm. The wavelength of this light inside glass of refractive index 1.5 is approximately
- 300 m
- 340 m
- 520 m
- 780 m
Answers to the questions of Physics on this page
Following list gives the correct choice for the answer of the Physics mcqs.
3506 . D
3507 . A
3508 . B
3509 . B
3510 . C
3511 . A
3512 . A
3513 . A
3514 . C
3515 . B
3516 . B
3517 . B
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