Class 10 Electricity Formulas

In this article we will try to provide all physics electricity formulas for class 10 science chapter 12.

Symbols and Notations

Given below are all the formulas used for class 10 electricity chapter

Charge q on a body is always denoted by
$q = n e$
where n = any integer positive or negative and $e = 1.602 \times 10^{- 19} C$ i. e., charge on an electron or proton.
$W o r k d o n e = c h a r g e \times p o t e n t i a l$ or potential difference
Mathematically,
$W = q V = q (V_{2} V_{1}) J o u l e$
$E l e c t r i c C u r r e n t = \frac{c h a r g e}{t i m e}$
Or,
$I = \frac{q}{t} A m p e r e$
Ohm’s Law
$R e s i s t a n c e = \frac{p o t e n t i a l d i f f e r e n c e}{c u r r e n t}$
Or,
$R = \frac{V}{I}$
$R = \frac{ρ l}{A}$
Resistance in series combination
$R_{s} = R_{1} + R_{2} + R_{3} + \dots . .$

Resistance in parallel combination
$\frac{1}{R_{p}} = \frac{1}{R_{1}} + \frac{1}{R_{2}} + \frac{1}{R_{3}} + \dots . .$
Electrical Power
$P = V I = I^{2} R = \frac{V^{2}}{R}$
Power in Series
$\frac{1}{P_{s}} = \frac{1}{P_{1}} + \frac{1}{P_{2}} + \frac{1}{P_{3}} + \dots . .$
Power in parallel
$P_{p} = P_{1} + P_{2} + P_{3} + \dots . .$
Electrical Energy
$E - V i t = I^{2} R t = \frac{V^{2}}{R} t$
Heat produced
$H - V i t = I^{2} R t = \frac{V^{2}}{R} t$