InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which waves cannot be polarized? |
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Answer» Sound waves cannot be polarized because Sound waves are longitudinal, meaning that they oscillate parallel to the direction of their motion. Since there is no component of a sound wave's oscillation that is perpendicular to its motion. |
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| 2. |
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% |
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Answer» C. Increase of 5% |
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| 3. |
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 |
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Answer» E. There are none |
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| 4. |
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 |
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Answer» D. that before and after tightening B has a higher frequency than A |
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| 5. |
Which away these x- ray , sound waves, and radio waves can be polarized ?x−raysradio wavessound wavesx−ray and radio waves |
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Answer» X - rays and radio waves can be polarized because they are transverse waves |
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| 6. |
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 |
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Answer» A. is a maximum |
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| 7. |
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 |
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Answer» B. of slightly different frequencies |
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| 8. |
“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 |
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Answer» B. combination of two waves of slightly different frequency |
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| 9. |
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 |
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Answer» E. the wave speed increases by a factor of 2 |
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| 10. |
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 |
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Answer» C. the magnitude of its displacement is a minimum |
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| 11. |
The sum of two sinusoidal traveling waves is a sinusoidal traveling wave only if: A. their amplitudes are the same and they travel in the same direction. B. their amplitudes are the same and they travel in opposite directions. C. their frequencies are the same and they travel in the same direction. D. their frequencies are the same and they travel in opposite directions. E. their frequencies are the same and their amplitudes are the same. |
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Answer» C. their frequencies are the same and they travel in the same direction. |
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| 12. |
A sinusoidal wave is generated by moving the end of a string up and down periodically. The generator must supply the greatest power when the end of the string A. has its greatest acceleration B. has its greatest displacement C. has half its greatest displacement D. has one-fourth its greatest displacement E. has its least displacement |
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Answer» E. has its least displacement |
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| 13. |
A sinusoidal wave is generated by moving the end of a string up and down periodically. The generator does not supply any power when the end of the string A. has its least acceleration B. has its greatest displacement C. has half its greatest displacement D. has one-fourth its greatest displacement E. has its least displacement |
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Answer» B. has its greatest displacement |
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| 14. |
The speed of a sinusoidal wave on a string depends on: A. the frequency of the wave B. the wavelength of the wave C. the length of the string D. the tension in the string E. the amplitude of the wave |
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Answer» D. the tension in the string |
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| 15. |
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 wavelength decreases by a factor of 4 D. the wavelength decreases by a factor of 2 E. the wavelength increases by a factor of 2 |
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Answer» D. the wavelength decreases by a factor of 2 |
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| 16. |
The time required for a small pulse to travel from A to B on a stretched cord shown is NOT altered by changing: A. the linear mass density of the cord B. the length between A and B C. the shape of the pulse D. the tension in the cord E. none of the above (changes in all alter the time) |
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Answer» C. the shape of the pulse |
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| 17. |
When a 100-Hz oscillator is used to generate a sinusoidal wave on a certain string the wavelength is 10 cm. When the tension in the string is doubled the generator produces a wave with a frequency and wavelength of: A. 200 Hz and 20 cm B. 141 Hz and 10 cm C. 100 Hz and 20 cm D. 100 Hz and 14 cm E. 50 Hz and 14 cm |
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Answer» D. 100 Hz and 14 cm |
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| 18. |
For a given medium, the frequency of a wave is: A. independent of wavelength B. proportional to wavelength C. inversely proportional to wavelength D. proportional to the amplitude E. inversely proportional to the amplitude |
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Answer» C. inversely proportional to wavelength |
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| 19. |
To raise the pitch of a certain piano string, the piano tuner: A. loosens the string B. tightens the string C. shortens the string D. lengthens the string E. removes some mass |
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Answer» B. tightens the string |
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| 20. |
Number of oscillations per unit time is calledA. wavelengthB. amplitudeC. displacementD. frequency |
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Answer» D. frequency |
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| 21. |
Amount by which one oscillation leads or lags behind another is calledA. in phaseB. intensityC. phase differenceD. superposition |
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Answer» C. phase difference |
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| 22. |
Speed of electromagnetic radiation is independent of A. wavelength B. amplitude C. time period D. frequency |
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Answer» D. frequency |
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| 23. |
Phase difference is measured inA. degreesB. metersC. secondsD. newton |
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Answer» The Correct option is A. degrees |
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| 24. |
Frequency and time period areA. directly relatedB. not relatedC. inversely relatedD. directly proportional |
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Answer» C. inversely related |
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| 25. |
Mechanical waves include A. sound B. light C. EM waves D. UV waves |
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Answer» The Correct option is A. sound |
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| 26. |
Changing magnetic field induces A. charge B. current C. frequency D. voltage |
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Answer» The Correct option is B. current |
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| 27. |
Speed at which stars and galaxies are moving away from us is determined by phenomena ofA. blue shiftB. yellow shiftC. red shiftD. orange shift |
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Answer» The Correct option is C. red shift |
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| 28. |
Unification of electromagnetic and weak nuclear forces was done byA. MaxwellB. FaradayC. KirchhoffD. Abdus-Salam |
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Answer» D. Abdus-Salam |
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| 29. |
A complete cycle of wave is around A. 90° B. 180° C. 45° D. 360° |
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Answer» The Correct option is D. 360° |
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| 30. |
Electric and magnetic fields vary at angle ofA. 30°B. 90°C. 45°D. 180° |
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Answer» The Correct option is B. 90° |
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| 31. |
Take the speed of sound to be 340 m/s. A thunder clap is heard about 3 s after the lightning is seen. The source of both light and sound is: A. moving overhead faster than the speed of sound B. emitting a much higher frequency than is heard C. emitting a much lower frequency than is heard D. about 1000 m away E. much more than 1000 m away |
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Answer» D. about 1000 m away |
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| 32. |
Consider two imaginary spherical surfaces with different radii, each centered on a point sound source emitting spherical waves. The power transmitted across the larger sphere is the power transmitted across the smaller and the intensity at a point on the larger sphere is the intensity at a point on the smaller. A. greater than, the same as B. greater than, greater than C. greater than, less than D. the same as, less than E. the same as, the same as |
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Answer» D. the same as, less than |
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| 33. |
Intensity of a wave is directly proportional to theA. amplitudeB. square of amplitudeC. cube of amplitudeD. frequency |
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Answer» B. square of amplitude |
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| 34. |
Wave speed is directly proportional toA. frequencyB. amplitudeC. wavelengthD. energy |
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Answer» C. wavelength |
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| 35. |
Longitudinal waves gives rise toA. amplitudeB. frequencyC. wavelengthD. high and low pressure regions |
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Answer» D. high and low pressure regions |
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| 36. |
Ranges of waves which overlap areA. x-rays and gamma raysB. x-rays and infrared raysC. gamma rays and infrared raysD. UV rays and infrared rays |
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Answer» A. x-rays and gamma rays |
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