Physics Practice MCQ Page 11
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: 374 What is the shape of the liquid meniscus in a capillary tube placed in a liquid that wets the surface of the tube?
- Flat
- Concave downwards
- Convex up
- None of the above is correct
Question: 375 A piece of weighted wood just floats in water. When place3d in alcohol (of lower density) it will
- float lower
- float higher
- stay as before
- sink
Question: 376 An explosion blows a rocket into three parts. Two piece go off at right angles to each other, a 100 kg piece at 12 m/s and 200 kg piece at 8 m/s. Then mass of third piece which flies off at an angle of 53° is
- 10 kg
- 20 kg
- 30 kg
- 40 kg
Question: 377 The pitch of a sound is determined by
- speed
- Frequency
- direction
- number of beats
Question: 378 At the mean position of vibration, the velocity of the vibrating particle is
- zero
- infinity
- maximum
- none of the above
Question: 379 A particle moving with S.H.M passes through two points A and B, with the same velocity, having occupied 2 seconds in passing from A to B; after another 2 seconds it returns to B. The period is
- 2 seconds
- 4 seconds
- 5 seconds
- 8 seconds
Question: 380 Energy is not transferred in a standing wave
- true
- false
- uncertain
- none of these
Question: 381 Neglecting damping, the amplitude of the wave
- is the same throughout
- varies periodically down the length of the spring
- drops of inversely with distance
- drops off the square of the distance
Question: 382 Two similar open organ pipes when sounded together produce 7 beats/sec. If their lengths are in the ration of 50: 51, then the ration of their frequencies will be
- 357:350
- 51:50
- 50:51
- 1:7
Question: 383 A tuning fork of frequency 512 produces 6 beats in 1 second, when vibrating along with a vibrating segment of a sonometer wire. The frequency of the vibration of sonometer wire is
- 512
- 506
- 518
- 506 and 518
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
Answers to the questions of Physics on this page
Following list gives the correct choice for the answer of the Physics mcqs.
374 . A
375 . A
376 . C
377 . B
378 . C
379 . D
380 . A
381 . B
382 . B
383 . D
384 . C
385 . C
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