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Sound — Science STD 8 — Question

Gujarat BoardEnglish MediumSTD 8ScienceSound1 Mark
MCQ
A simple pendulum makes $10$ oscillation in $20$ seconds. What is the time period and frequency of its oscillations?
  • ✓
    $0.5hz$ and $2s$ respectively.
  • B
    $0.1hz$ and $0.5s$ respectively.
  • C
    $0.2hz$ and $3s$ respectively.
  • D
    $0.3hz$ and $4s$ respectively.
✓

Answer

Correct option: A.
$0.5hz$ and $2s$ respectively.

Oscillation $= 10$, time taken $= 20$s as we know that the number of oscillations per second is frequency.
Frequency = no. Of oscillations/ time taken $= 10/ 20 = 0.5hz.$
Time period = 1/ frequency $= 1/ 0.5 = 2s.$

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