Electric Charges & Fields
Class 12 · Electric Charges & Fields

E vs r Curve

1/r² curve with live cursor. Check E falls fourfold when r doubles.

Run simulation

Key Notes

01

E from a point charge falls as 1/r² — fast decay with distance.

02

Doubling r → E/4. Tripling r → E/9. Halving r → 4E.

03

Plot of E vs r is a hyperbola with asymptotes along both axes.

Formulas

Magnitude

Falls as inverse square.

Important Points

Inside a conductor in equilibrium, E = 0 regardless of distance.

Use log-log plots to confirm 1/r² law experimentally — slope = −2.

E vs r Curve 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.