Class 10PhysicsChapter 12: Electricity

Key Formulas

Summary of key formulas for Electricity.

Concept	Formula
Current	$I = \dfrac{Q}{t}$
Potential difference	$V = \dfrac{W}{Q}$
Ohm's Law	$V = IR$
Resistance	$R = \rho\dfrac{l}{A}$
Series resistance	$R_{\text{eq}} = R_1 + R_2 + \cdots$
Parallel resistance	$\dfrac{1}{R_{\text{eq}}} = \dfrac{1}{R_1} + \dfrac{1}{R_2} + \cdots$
Joule's Law	$H = I^2 R t$
Power	$P = VI = I^2R = \dfrac{V^2}{R}$

12.6 Electric Power

Electric power, the watt, kilowatt-hour, and a worked example.

Class 12

CBSE Class 12 notes for Mathematics and Physics.