Physics Revision : Waves
For sec 3/4/5 Physics students revision by mr gui eng hong Singapore
- 1.
What is a Transverse wave ?
- A.
Wave that has particles vibrating up and down
- B.
Wave that has particles vibrating left and right
- C.
Wave that has particles that vibrate perpendicular to wave direction
- D.
Wave that has particles that vibrate parallel to wave direction
Correct Answer
C. Wave that has particles that vibrate perpendicular to wave directionExplanation
Transverse wave has particles vibrating perpendicular to wave. Longitudinal wave has particles vibrating parallel to wave.Rate this question:
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- 2.
Which wave is a Longitudinal wave?
- A.
Sound wave
- B.
Light wave
- C.
Infra-Red wave
- D.
X-ray
Correct Answer
A. Sound waveExplanation
sound is the ONLY example of Longitudinal wave. the others are transverse wavesRate this question:
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- 3.
A wave makes 10 oscillations in 5s. What is its frequency?
- A.
0.5 s
- B.
0.5 Hz
- C.
2 s
- D.
2 Hz
Correct Answer
D. 2 HzExplanation
frequency is the number of oscillations made per second. 2 Hz means 2 oscillations made per second.Rate this question:
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- 4.
A 100 Hz wave has wavelength 2.0 m. What is its speed?
- A.
0.02 m/s
- B.
2 m/s
- C.
50 m/s
- D.
200 m/s
Correct Answer
D. 200 m/sExplanation
speed = frequency x wavelengthRate this question:
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- 5.
A light wave travels from air into plastic. which is true?
- A.
Frequency reduces
- B.
Only speed reduces
- C.
Frequency , speed and wavelength reduces
- D.
Speed and wavelength reduces
Correct Answer
D. Speed and wavelength reducesExplanation
frequency of wave depends on the source. when light slows down, frequency remains unchanged. since speed = frequency x wavelength, when speed decreases, wavelength also decreasesRate this question:
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- 6.
The speed of light in vacuum is . . .
- A.
3 x 10^8 m/s
- B.
308 m/s
- C.
300 m/s
- D.
3 x 108 m/s
Correct Answer
A. 3 x 10^8 m/sExplanation
all elctromagnetic wave travels at 300 000 000 m/s in vacuumRate this question:
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- 7.
V : speed. F: frequency L: wavelength T:period. which equation is correct?
- A.
V=L/T
- B.
V=LT
- C.
V=F/T
- D.
V=FT
Correct Answer
A. V=L/TExplanation
F=1/T. V=FL = (1/T)L = L/T. Combine 2 equeations.Rate this question:
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Apr 12, 2024Quiz Edited by
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Jul 14, 2010Quiz Created by
Mrguienghong
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