MCQ practice · SSC Physics Board questions · Chapter 7: Waves and Sound
What is the time period of the wave produced by the tuning fork?
Think it through first, then pick an option.
- a 0.0005 s
- b 0.005 s
- c 0.05 s
- d 0.5 s
Answer and explanation
Correct answer: a 0.0005 s
f = 2 kHz = 2000 Hz, so T = 1/f = 0.0005 s.
Why the other options are wrong
- b 0.005 s: 0.005 s would need f = 200 Hz. A kHz must be multiplied by 1000 to get Hz.
- c 0.05 s: 0.05 s would need f = 20 Hz; here f = 2000 Hz.
- d 0.5 s: 0.5 s = 1/2; the kHz was not changed into Hz.
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