A source vibrates with a period of 0.02 s. What is its frequency?
Answer and explanation
Correct answer: C. 50 Hz
- Step 1: Frequency is the reciprocal of period: .
- Step 2: Hz.
Answer
50 Hz.
Why not the others: 0.02 Hz: it repeats the period. 100 Hz: it doubles the correct value. 5 Hz: it moves the decimal point the wrong way.
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