An alternating voltage completes 80 cycles in 2 seconds. Find the frequency.

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  1. 40 Hz
  2. 160 Hz
  3. 20 Hz
  4. 480 Hz

Answer (Detailed Solution Below)

Option 1 : 40 Hz
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Detailed Solution

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Concept:

\(Frequency ~(f) = \frac{Number ~of~ Cycles}{ Time ~(in ~seconds)}\)

Number of Cycles = 80, Time = 2 seconds

\(Frequency ~(f) = \frac{80~ Cycles}{ 2 ~(in ~seconds)}\)

Frequency (f) = 40 cycles per second

Therefore, the frequency of the alternating voltage is 40 hertz (Hz).

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