# NEET Questions Solved

The temperature of a wire of length 1 metre and area of cross-section $1c{m}^{2}$ is increased from 0°C to 100°C. If the rod is not allowed to increase in length, the force required will be

(a) ${10}^{3}N$                     (b) ${10}^{4}N$

(c) ${10}^{5}N$                     (d) ${10}^{9}N$

(b) F = force developed= YA $\alpha \left(∆\theta \right)$

$={10}^{11}×{10}^{-4}×{10}^{-5}×100={10}^{4}N$

Difficulty Level:

• 12%
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