Electric Charges & Fields

Class 12 · Electric Charges & Fields

Field Inside a Conductor

Electrons drift to surface; E inside drops to zero in equilibrium.

Run simulation 1 PYQs

Key Notes

01

In electrostatic equilibrium, E = 0 inside a conductor.

02

All excess charge resides on the OUTER surface.

03

Surface field is perpendicular to the surface (else electrons would move).

Formulas

Surface field

Just outside conductor surface.

Important Points

If E ≠ 0 inside, mobile electrons would move — contradicting equilibrium.

Cavity inside conductor (no charge inside): E = 0 inside cavity too.

Field Inside a Conductor notes from sciphylab (also known as SciPhy, SciPhy Lab, SciPhy Labs, Physics Lab). Class 12 physics revision for JEE Mains, JEE Advanced, NEET UG, AP Physics 1/2/C, SAT, and CUET-UG.