Multiple choice Frequency of vibration of a sitar is 200 Hz. The time period is 0.005 s 50 s 500 s 200 s Reveal answer Fill a bubble to check yourself A Correct answer Explanation Time period is the reciprocal of frequency: T = 1/f. For a frequency of 200 Hz, T = 1/200 = 0.005 seconds. This means one complete vibration cycle takes 0.005 seconds.