A small insulating sphere of mass hangs from a massless string
PHYSICS · Subjective · CBSE · Physics · Electric Charges and Fields · Electric Charges and Fields
Problem
A small insulating sphere of mass m hangs from a massless string. When a uniform horizontal electric field of magnitude E is applied, the string settles at a constant angle θ from the vertical. Derive an expression for the magnitude and sign of the sphere’s electric charge q in terms of m, g, E, and θ.