MCQ
A clock pendulum having coefficient of linear expansion. $\alpha = 9 \times 10^{-7}/^\circ C^{-1}$ has a period of $0.5 s$ at $20^\circ C$. If the clock is used in a climate, where the temperature is $30^\circ C,$ how much time does the clock lose in each oscillation? $(g =$ constant$)$
- A$5 \times 10^{-7 }s$
- ✓$2.25 \times 10^{-6} s$
- C$1.125 \times 10^{-6 }s$
- D$2.5 \times 10^{-7 }s$