The time period of a vibrating body is 0.04 s. What is the frequency of the wave produced?
A20 Hz
B25 Hz
C250 Hz
D200 Hz
Answer & Solution
Correct answer: B. 25 Hz
1. Frequency f = 1 / Time period T.
2. f = 1 / 0.04 = 100/4.
3. f = 25 Hz.
_Source: RRB Group D CEN-02/2018 PYQ, Q.14._
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