NEET UG PHYSICS MCQ: WAVES

1 Easy

1 of 1

Application +4 | -1

A string of length

l

is fixed at both ends. It is vibrating in its

3^{\text {rd}}

overtone with maximum amplitude

a=2 \sqrt{3} \mathrm{~mm}

. Find the square of amplitude (in

\mathrm{mm}^2

) at a distance

\frac{l}{3}

from one end.

View answer and explanation

Correct option: A

9

Option A is correct because the amplitude at a distance l/3 from one end in the 3rd overtone is a*sqrt(3)/2, and squaring it gives 9.

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