Statement 1: A pendulum made of an insulated rigid massless rod of length l is attached to a
Channel: Doubtnut
Date: 12/04/2020

Statement 1: A pendulum made of an insulated rigid massless rod of length l is attached to a small sphere of mass m and charge q. The pendulum is undergoinng oscillations of small amplitude having time period T. Now a uniform horizontal magnetic field `vec B` out of plane of page is switched on. As a result of this change, the time period of oscillations does not change.   img src="https://d10lpgp6xz60nq.cloudfront.net/physics_images/RES_PHY_RK_JM_FT2_E01_1352_Q01.png" width="80%"   Statement 2: A force acting along the string on the bob of a simple pendulum (such that tension in string is never zero) does not produce any restoring torque on the bob about the hinge.