The bob of a pendulum has mass `m= 1kg` and charge `q= 40 muC`. Length of the pendulum
Channel: Doubtnut
Date: 19/01/2020

The bob of a pendulum has mass `m= 1kg` and charge `q= 40 muC`. Length of the pendulum is `l=0.9m`. The point of suspension also has the same charge `40 mu C`. What the minimum speed `u` should be imparted to the bob so that it can complete verticel circel ?