Question

The temperature of a wire of length 1 metre and area of cross-section $1 \mathrm {~cm} ^ { 2 }$ is increased from 0°C to 100°C. If the rod is not allowed to increase in length, the force required will be and $\left. Y = 10 ^ { 11 } \mathrm {~N} / \mathrm { m } ^ { 2 } \right)$

• A.
• B.
• C.
• D.

Answer 1

Answer: (B)

Answer 2

$F =$force developed$= Y A \alpha ( \Delta \theta )$