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A steel wire of uniform cross-section `1 mm^(2)` is heated to `70^(@)C` and stretched by tying it two ends rigidly. Calculate the change in tension on the wire when temperature falls form `70^(@)C` to `35^(@)C`

A

55 N

B

88 N

C

66 N

D

77 N

Text Solution

Verified by Experts

The correct Answer is:
D
`F=YA alpha Delta t`
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