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Q.

The Young's modulus of the materials of the rod is,2×1011N/m2 and its density is 8000 kg/m3. The time taken by a sound wave to traverse 1 m of the rod will be

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a

10−4s

b

2×10−4s

c

8×10−2s

d

16×10−2s

answer is B.

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Detailed Solution

. The speed of sound wave in a rod is given by V=Yd=2×10118000=5000m/s Time taken to traveEe 1 m is Siven by t=15000=2×10−4s
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