If the length of a simple pendulum is equal to the radius of the earth, its time period will be
A. `2pisqrt(R//g)`
B. `2pi sqrt (R//2g)`
C. `2 pi sqrt (2R//g)`
D. infinite
A. `2pisqrt(R//g)`
B. `2pi sqrt (R//2g)`
C. `2 pi sqrt (2R//g)`
D. infinite
Correct Answer – B
`T = 2pi sqrt((1)/(g((1)/(l) + (1)/(R))`
put `l = R`