Physics-
General
Easy
Question
A copper wire is fixed between two rigid supports. It is stretched with negligible tension at 30°C. The speed of transverse waves in the wire at 10°C will be– (density d = 9 × 103 kg/m3 , Young's modulus Y = 1.3 × 1011 N/m² and temperature coefficient of expansion a = 1.7 × 10–5 /°C):–
- 210 m/s
- 110 m/s
- 90 m/s
- 70 m/s
The correct answer is: 70 m/s
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