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Q.

A string of length L, fixed at its both ends is vibrating in its lst overtone mode. Consider two elements of the string of same small length at positions l1 = 0.2L and l2 = 0.45L from one end. If K1 and K2 are their respective maximum kinetic energies then

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a

K1 = K2

b

K1 > K2

c

K1 <K2

d

it is not possible to decide the relation

answer is B.

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Detailed Solution

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It is obvious that particle at 0.2 L will have larger amplitude than particle at 0.45 L,0.5 L being the node and 0.25 L being antinode.

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