NEET UG PHYSICS MCQ: WAVES

1 Hard

1 of 1

Application +4 | -1

A wave pulse starts propagating in +ve X-direction along a non-uniform wire of length '

L

', with mass per unit length given by

\mu=M_o+\alpha x

and under a tension of

TN

. Find the time taken by the pulse to travel from the lighter end

(x=0)

to the heavier end.

View answer and explanation

Correct option: A

t=\frac{2}{3 \alpha \sqrt{T}}\left[\left(M_o+\alpha L\right)^{3 / 2}-M_o^{3 / 2}\right]

Option A (

t=\frac{2}{3 \alpha \sqrt{T}}\left[\left(M_o+\alpha L\right)^{3 / 2}-M_o^{3 / 2}\right]

) is correct because the time is calculated by integrating the inverse of the wave speed over the length of the wire.

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