Calculate the frequency, in hertz, for 120 Oscillations in 2.0 s
A
60 Hz
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B
100 Hz
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C
80 Hz
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D
120 Hz
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Solution
The correct option is A 60 Hz The frequency (f) of a wave is the number of full waveforms generated per second. This is the same as the number of repetitions per second or the number of oscillations per second. Time Period (T) is the number of seconds per waveform or the number of seconds per oscillation. It is clear that frequency and period are reciprocals. In the first case, there are 120 Oscillations in 2.0 s. That is, the frequency is given as f=1202=60Hz.