Electrostatic Potential & Capacitance
Class 12 · Electrostatic Potential & Capacitance

Work Moving a Charge

W = q(V_B − V_A). Independent of path between two equipotentials.

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Key Notes

01

Work done by external agent moving charge q from A to B: W = q(V_B − V_A).

02

Path-independent (electrostatic field is conservative).

03

If V_B > V_A and q > 0: positive work needed (field opposes motion).

Formulas

Work-Energy

Equals change in PE.

Important Points

Moving along equipotential: W = 0.

Sign matters: a +q falling down a potential gradient gains KE.

Work Moving a Charge 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.