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Physics Past Questions and Answers

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Physics Questions

Question 441:

A wave has a frequency of 2Hz and a wavelength of 30cm. The velocity of the wave is

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A 60.0ms<sup style='font-size: smaller;'>-1</sup>
B 6.0ms<sup style='font-size: smaller;'>-1</sup>
C 1.5ms<sup style='font-size: smaller;'>-1</sup>
D 0.6ms<sup style='font-size: smaller;'>-1</sup>

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Question 442:

A boat at anchor is rocked by waves whose crest are 100m apart and whose velocity is 25ms<sup style='font-size: smaller;'>-1</sup>. At what interval does the wave crest reach the boat?

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A 2500.00s
B 75.00s
C 4.00s
D 0.25s

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Question 443:

Which of the following instruments has a pure tone?

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A Guitar
B Vibrating strings
C Tuning fork
D Siren

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Question 444:

The lowest note emitted by a stretched string has a frequency of 40Hz. How many overtones are there between 40Hz and 150Hz?

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A 1
B 2
C 3
D 4

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Question 445:

Which of the following statements supports the assumption that light travels in straight lines?

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A Light can be diffracted
B A source of light produces distinct shadows of opaque objects
C A source of light produces interference patterns on a suitably placed screen
D Light can be reflected

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