1.

If the temperature of a wire of length 2 m and area of cross-section 1 cm^2 is increased from 0^0c to80^0 c and is not allowed to increase in length then force requred for is (Y= 10^{10}N/m^2. α= 10^{-6}/^0 C) 1 80N 2) 160N 3) 400N 4) 120 N

Answer» If the temperature of a wire of length 2 m and area of cross-section 1 cm^2 is increased from 0^0c to80^0 c and is not allowed to increase in length then force requred for is (Y= 10^{10}N/m^2. α= 10^{-6}/^0 C) 1 80N 2) 160N 3) 400N 4) 120 N


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