Question
Why invar is used in making pendulum clocks?
Solution
Invar is an alloy which has a low value of temperature coefficient of expansion. The length of a pendulum made of invar does not change with temperature and hence the time period of oscillation remains the same. Hence the time shown by the clock is accurate.
Thus, invar is used in making the pendulum clocks.
Thus, invar is used in making the pendulum clocks.
