Elasticity, Thermal Expansion, Calorimetry and Heat Transfer: Linear Expansion MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

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Linear ExpansionHardQuestion 30833

Question

A second's pendulum clock gains time in summer because:

A
Pendulum length increases
Correct
B
Pendulum length decreases
C
Air resistance drops
D
Gravity changes

Correct answer

Pendulum length increases

Explanation

T = 2π√(L/g). If L increases with temperature, T increases — the clock ticks slower, losing time (not gaining). A clock that runs slow loses time. So the statement should say 'loses time'.

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