What causes electric field lines to emerge perpendicularly from the surface of a charged conductor?
**Vector addition of forces** underlies multi-charge analysis. Each pair contributes independent Coulomb force, resultant obtained by resolving components along axes. Equilibrium occurs when vector sum vanishes, often at symmetric points where contributions balance. In equilibrium, the field inside a conductor is zero. Any tangential component outside would drive surface charge motion, violating equilibrium. Thus, the field must be perpendicular to avoid such motion, maintaining static conditions. Substituting values gives Equilibrium condition, which matches expected magnitude for this electr
Ref: NCERT > Physics Book > Electric Charges and Fields > Superposition Principle and Equilibrium of Charges
