Question

Two pandulum start oscillation in the same direction at a same time from the same mean position time period are respectively `2 s` and `1.5s`. The phase difference between them, when the smaller pendulum is complated vibration, will be
A. `pi//4`
B. `pi//2`
C. `2pi//3`
D. `3pi//2`

Answer 1

Correct Answer - B
Smaller pendulum will be that for which time period is less , here `1.5s` so when this completes one vibration, the bigger pendulum will complete its oscillation (because its nnegative extreme position .Hence the small pendulum will be ahead by a phase of `pi//2` than bigger pendulum at this time