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A steel rod of diameter 1 cm is clamped firmly at each end when its temperature is 25 degrees celcius so that it cannot contract on cooling. The tension in the rod at 0 degrees celcius is a) 4000 N b) 7000 N c) 7400 N d) 4700 N

A steel rod of diameter 1 cm is clamped firmly at each end when its temperature is 25 degrees celcius so that it cannot contract on cooling. The tension in the rod at 0 degrees celcius is


a) 4000 N


b) 7000 N


c) 7400 N


d) 4700 N

Grade:12

1 Answers

Jaya IITK
207 Points
11 years ago

answer:

change in length if it was not clamped(l')=l*alpha of steel* change of temp.

young's modulus of steel=tension/area*(l'/l)

 

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