Physics-Time Period & Frequency

NEET Physics Time Period & Frequency MCQ Question

Type: MCQ-diagram based-Hard-Class 11

Consider a periodic function expressed as a superposition of sine and cosine functions with different time periods. If you have a function f(t) = sin(ωt) + cos(2ωt) + sin(4ωt), which of the following correctly describes its periodic nature?

Question diagram
A

The function is non-periodic due to different angular frequencies.

B

The function is periodic with a period of 2π/ω.

C

The function is periodic with a period of 2π.

D

The function is periodic with a period of π/ω.

Correct Answer

Option B

Detailed Explanation

According to the context, a function like sin(ωt) + cos(2ωt) + sin(4ωt) is periodic and the period is determined by the largest common multiple of the individual periods, which is 2π/ω.

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