Question

Time taken to complete one vibration is called
a. Frequency
b. Time period
c. Amplitude
d. None of these

Answer 1

Hint: Vibration is the mechanical oscillations of a body and periodic motion of the particles of an elastic object. It doesn't move permanently out of position, when an object vibrates. The restoring force will act on the object to change direction and force the object to settle back in its original position. The unit of vibration is hertz. The number of oscillations of an oscillating body per second is known as frequency.

Complete step by step answer:
The time taken by a vibrating body to complete one vibration is time period. When the object moves from one extreme position to the other extreme a complete cycle of vibration occurs. A time period T is the time acquired for one complete cycle of vibration to reach a point. Frequency of a wave increases so the time period of the wave decreases. Frequency and Period are in reciprocal to each other. Time Period equals the Total time of the wave divided by the number of cycles of the wave.
Formula for one time period, $T = \dfrac{1}{f}$
In this formula T is time period and f is frequency.

SI unit of time period is s, second. Time period is denoted as T. Where time Period is the seconds per cycle and time period defines quantity of time. Frequency tells quantity of rate. Frequency is the cycles per second. The time period depends upon the length of the body.

Hence, the correct answer is option (B).

Note: In a uniform motion cycle continues its cycle. The time period of oscillation is the time taken of the string to complete one oscillation. The difference between time period and frequency in which period is the time in which a wave cycle is completed. Frequency is the number of complete cycles of a wave achieving in a particular amount of time.