JAMB Physics 2020 Objective — Question 7

Question 7 of 40 from the Joint Admissions and Matriculation Board (JAMB) Physics 2020 Objective paper, with the correct answer and a full explanation.

7. A disc rotates on a player at constant speed of 200 revolutions per minute. Determine the period of rotation.

A. A. 1.2s
B. B. 0.6s
C. C. 0.5s
D. D. 0.3sCorrect

Explanation

Speed = 200 revolutions per minute = 200/60Hz = 3.3333Hz. T = 1/f = 1/3.3333 = 0.3s.

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