Q. A Pendulum Clock, whose pendulum is made up of a steel rod, will become slow if __:

1. Temperature rises
2. Taken to moon
3. Taken from equator to pole

Choose the correct option from the codes given below:
Answer: Only 1 & 2
Notes: The length of the pendulum increases if temperature increases and the time period T increases and a pendulum takes more time to complete one oscillation. That is why it becomes slow. As the moon's gravity of about 1/6 of Earth's gravity, and period of a pendulum increases with a decrease in gravity so it will take more time to complete one oscillation. When a pendulum is taken from the equator to the pole, gravity increases, Time period decreases and it will start oscillating faster.

This question is part of UPSC Daily 20 MCQ Series Course on GKToday Android app.