Question

If the length of simple pendulum is increased to four times then its period __________.

• A. becomes doubled
• B. remains same
• C. becomes three times
• D. becomes four times

Answer 1

The correct option is A becomes doubled

$T=2\pi \sqrt{\frac{l}{g}}{T}_1=2\pi \sqrt{\frac{4l}{g}}=2\pi \sqrt{\frac{l}{g}}\times 2=2T$