Question

Assertion (A): The pendulum clock made up of a metal losses time at high temperature
Reason (R): When a metal rod is heated, then it contracts

• A. Both A and R are true and R is the correct explanation of A
• B. Both A and R are true and R is not the correct explanation of A
• C. A is true and R is false
• D. A is false and R is true

Answer 1

The correct option is C A is true and R is false

When metal is heated its length increases and thus time period increases
$T=2\pi \sqrt{\frac{l}{g}}$; Thus it loses time.