47th B.P.S.C. (Pre) 2005
The time period of a pendulum –
aDepends on the mass
bDepends on its length✓ Correct
cDepends on time
dDepends on temperature
Explanation
The time period of a simple pendulum depends on the length of the pendulum. $$T = 2\pi \sqrt{\frac{l}{g}}$$ Here $\pi$ and $g$ are constants. The time period is proportional to the square root of the length (l).
general-science