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Q.

A speed of transverse wave on a straight wire (mass 6.0 g, length 60 cm) and area of cross-section of wire  1.0 mm2 is 90 m/sec  . If the young’s modulus of wire is  16×1011N/m2. The extension of wire over a natural length is ______mm

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answer is 0000.03 .

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Detailed Solution

Speed of sound in stringV=Tμ ⇒90=YAΔllml=16×1011×10-6×Δl6×10−3  ⇒Δl=0.03​ mm.
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