Question

% Question A pendulum clock gives correct time at $20^\circ$C. If the coefficient of linear expansion of the pendulum's material is \alpha = 1.2 \times 10^{-5} /^\circC, the clock will lose time per day at $40^\circ$C by approximately:

• A. 10.4 s
• B. 5.2 s
• C. 20.8 s
• D. 2.6 s

Hint:

Key Exam Tip:
Time lost per day by a pendulum clock is approximately $86400 \times (\frac{1}{2} \alpha \Delta \theta)$, where $\Delta T / T_0 \approx \frac{1}{2} \alpha \Delta \theta$.

Answer 1

The Correct Option is B