Electrostatic Potential & Capacitance
Class 12 · Electrostatic Potential & Capacitance
Parallel-Plate Capacitor
C = ε₀A/d. Animated dots show field. Live Q, E, U.
Key Notes
01
Capacitance C = Q/V, measure of charge stored per volt.
02
Parallel plates: C = ε₀A/d (vacuum). Add dielectric κ: C = κε₀A/d.
03
Energy stored U = ½CV² = Q²/(2C).
Formulas
Capacitance
Vacuum, parallel plates.
Field
Uniform between plates.
Energy
Work to charge cap.
Important Points
SI unit of C: farad = C/V (very large; pF–μF in practice).
Bigger A or smaller d → larger C.
Parallel-Plate Capacitor 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.