Home PYQs UPPSC UPPSC MCQs Prelims 1994 (GS Paper I)

Question

Why do pendulum clocks usually lose time in summer?

  1. Due to longer days in summer
  2. Due to friction caused by coils
  3. Length of the pendulum increases, increasing the time period of unit oscillation
  4. The weight of the pendulum increases in summer

Answer:

Option C: Length of the pendulum increases, increasing the time period of unit oscillation

Detailed Solution:

The correct answer is “ Length of the pendulum increases, increasing the time period of unit oscillation”.

Pendulum clocks become slow in summer because the length of the pendulum increases due to which the time period increases and the pendulum takes more time to complete one oscillation.