Question

The motion of a torsional pendulum is 

(a) period (b) oscillatory (c) simple harmonic (d) angular simple harmonic.  

Answer 1

Correct option: (a),(b),(d)

EXPLANATION:  

(a) true because it repeats its motion at a regular time interval. 

(b) true because it is angular to and fro motion.  Since the oscillation is not on a straight line it is not a simple harmonic motion, 

(c) is not true. 

(d) is true because the torque is directly proportional to the angular displacement and in the opposite sense of it.