A  particle of mass m and charge Q is attached to a string of length l. It is whirled in a
Channel: Doubtnut
Date: 02/11/2021

Please add descrA  particle of mass m and charge Q is attached to a string of length l. It is whirled in a vertical circle in the region of an electric field E as shown in the figure-5.105.What is the speed given to the particle at the point B,so that tension in the string when the particle is at A is ten times the weight of the particle?