Related InterviewSolutions

• Which waves cannot be polarized?
• If the length of a piano wire (of given density) is increased by 5%, what approximate change in tension is necessary to keep its fundamental frequency unchanged? A. Decrease of 10% B. Decrease of 5% C. Increase of 5% D. Increase of 10% E. Increase of 20%
• Two pipes are each open at one end and closed at the other. Pipe A has length L and pipe B has length 2L. Which harmonic of pipe B matches in frequency the fundamental of pipe A? A. The fundamental B. The second C. The third D. The fourth E. There are none
• Two identical strings, A and B, have nearly the same tension. When they both vibrate in their fundamental resonant modes, there is a beat frequency of 3 Hz. When string B is tightened slightly, to increase the tension, the beat frequency becomes 6 Hz. This means: A. that before tightening A had a higher frequency than B, but after tightening, B has a higher frequency than A B. that before tightening B had a higher frequency than A, but after tightening, A has a higher frequency than B C. that before and after tightening A has a higher frequency than B D. that before and after tightening B has a higher frequency than A E. none of the above
• Which away these x- ray , sound waves, and radio waves can be polarized ?x−raysradio wavessound wavesx−ray and radio waves
• At points in a sound wave where the gas is maximally compressed, the pressure A. is a maximum B. is a minimum C. is equal to the ambient value D. is greater than the ambient value but less than the maximum E. is less than the ambient value but greater than the minimum
• To produce beats it is necessary to use two waves: A. traveling in opposite directions B. of slightly different frequencies C. of equal wavelengths D. of equal amplitudes E. whose ratio of frequencies is an integer
• “Beats” in sound refer to: A. interference of two waves of the same frequency B. combination of two waves of slightly different frequency C. reversal of phase of reflected wave relative to incident wave D. two media having slightly different sound velocities E. effect of relative motion of source and observer
• A long string is constructed by joining the ends of two shorter strings. The tension in the strings is the same but string I has 4 times the linear mass density of string II. When a sinusoidal wave passes from string I to string II: A. the frequency decreases by a factor of 4 B. the frequency decreases by a factor of 2 C. the wave speed decreases by a factor of 4 D. the wave speed decreases by a factor of 2 E. the wave speed increases by a factor of 2
• Any point on a string carrying a sinusoidal wave is moving with its maximum speed when: A. the magnitude of its acceleration is a maximum B. the magnitude of its displacement is a maximum C. the magnitude of its displacement is a minimum D. the magnitude of its displacement is half the amplitude E. the magnitude of its displacement is one-fourth the amplitude