learn.howToCalculate

learn.whatIsHeading

Ohm's Law states that voltage (V) equals current (I) multiplied by resistance (R): V = IR. It is the foundation of electrical circuit analysis. Power (P = VI = I²R = V²/R) describes the energy converted per second.

Trinn-for-trinn guide

1. 1Identify any two known values: voltage (V), current (A), or resistance (Ω)
2. 2Rearrange: V = IR, I = V/R, R = V/I
3. 3Calculate power: P = V × I = I²R = V²/R
4. 4Apply units: Volts (V), Amperes (A), Ohms (Ω), Watts (W)

Løste eksempler