Question

One oscillation of a pendulum is
(a) the time taken for a complete to and fro movement.
(b) the distance travelled by the bob from the mean position.
(c) the movement of the bob from one extreme position to the other extreme.
(d) one complete to and fro movement about the mean position.

Answer 1

(d) one complete to and fro movement about the mean position.
One oscillation of a pendulum is one cycle in its motion. The cycle includes the movement of pendulum from mean position to one extreme position then to the mean position and then to the other extreme position and return to the mean position.