Physics-Thermal Expansion
NEET Physics Thermal Expansion MCQ Question
Type: MCQ-numerical-Medium-Class 11
A steel rod is fixed at both ends and heated from 27°C to 77°C. If the coefficient of linear expansion for steel is 1.2 × 10^-5 K^-1, what is the compressive strain developed in the rod?
A
6.0 × 10^-4
B
2 × 10^-4
C
6 × 10^-3
D
4 × 10^-4
Correct Answer
Option A
Detailed Explanation
The compressive strain is given by α_l × ΔT, where ΔT = 77°C - 27°C = 50°C. Thus, strain = 1.2 × 10^-5 × 50 = 6.0 × 10^-4.
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