Physics Practice MCQ Page 12
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: 384 A tuning fork of frequency 645 Hz, gives resonance for 0.5 m column of hydrogen gas enclosed in a pipe closed at one end.The speed of sound in hydrogen will be equal to
- 322.5 m/s
- 645 m/s
- 2580 m/s
- 1290 m/s
Question: 385 The Laplaces's correction in the expression for the velocity of sound given by Newton is needed because sound waves
- are longitudinal
- propagate isothermally
- propagate adiabatically
- are of long wavelengths
Question: 386 A tuning fork A produces 4 beats with a tuning fork B of frequency 256 Hz. A is filed at the top of the prong and the number of beats increases. What was its original frequency
- 260 Hz
- 258 Hz
- 252 Hz
- 250 Hz
Question: 387 The apparent frequency of the whistle of an engine changes in the ratio of 6:5 as the engine passes a stationary observer. If velocity of sound is 330 m/s, then velocity of the engine is
- 15 m/s
- 30 m/s
- 33 m/s
- 45 m/s
Question: 388 The reverberation of sound in a hall results due to its continued
- Reflection
- Interference
- Diffraction
- Absorption
Question: 389 The internal energy of monoatomic gass is
- 3/2 RT
- independent of temperature
- in the form of kinetic energy
- partially kinetic and partially potential
Question: 390 Two vessels having equal volume contain molecular hydrogen at one atmosphere respectively., If both samples are at the same temperature, the mean velocity of hydrogen molecules is
- equal to that of helium
- twice of helium
- half that of helium
- 2 times that of helium
Question: 391 The kinetic molecular theory of gases is based upon
- assumptions that are considered dubious
- experimental observations of molecules
- assumptions that are considered valid because the results of the theory agree with experimental data
- assumptions that are considered valid because they are in accord with our intuitive feelings
Question: 392 A diatomic molecule has ....... degrees of freedom in general
- Six
- Five
- Four
- Three
Question: 393 Whenever a system is made to complete a cyclic process, the work done during the complete cycle
- is zero
- is positive
- is negative
- depends upon the path followed
Question: 394 During an isothermal compression, it the pressure of a given mass of a gas of volume V increased by 10 fold, the change that will take place
- volume will become 10V, head will be absorbed
- volume will become 10V, heat will be given out
- volume will become V/10, heat will be absorbed
- volume will become V/10, heat will be given out
Question: 395 If a black body is surrounded at room temperature by another body at a higher temperature, the heat energy radiated per unit area per second is
- proportional to the difference of temperature between the two
- proportional to the fourth power temperature difference between the two
- Equal to Steafan's constant times the fourth power of temperature difference between two
- proportional the the square of the temperature difference.
Answers to the questions of Physics on this page
Following list gives the correct choice for the answer of the Physics mcqs.
384 . C
385 . C
386 . A
387 . B
388 . A
389 . A
390 . C
391 . C
392 . B
393 . D
394 . C
395 . B
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MCQ for Practicing Subject Tests