In Europe an electric razor completes 50 vibrations in 1 s. The frequency of these vibrations is
A)50 Hz with a period of 1/50 s.
B)1/50 Hz with a period of 50 s.
C)50 Hz with a period of 50 s.
D)1/50 Hz with a period of 1/50 s.

Question

Quizplus · Accepted Answer

The frequency of the electric razor's vibrations is the number of vibrations completed in one second, which is given as 50. Therefore, the frequency is 50 Hz. The period is the time taken for one complete vibration, which is the inverse of the frequency. So the period is 1/50 s. Hence, option A) is correct.

In Europe an Electric Razor Completes 50 Vibrations in 1