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If the temperature of a wire of length 2...

If the temperature of a wire of length 2 m and area of cross-section `1 cm^2` is increased from `0^(@)`C to `80^(@)`C and is not allowed to increase in length, then force required for it is `(Y 10^10 N//m^2, prop=10^-6//”^(@)C)`

A

80 N

B

`160 N`

C

`400 N`

D

`120 N`

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