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Physics

Ohm's Law

Formula
V = I × R

What is Ohm's Law?

Ohm's Law states that the voltage across a conductor equals the current flowing through it times its resistance. It is the fundamental relationship in electrical circuits.

Variables

  • V
    V — Voltage (in Volts)
  • I
    I — Current (in Amperes)
  • R
    R — Resistance (in Ohms)

Worked Examples

Example 1

What is the voltage across a 12 Ω resistor carrying 2 A of current?

Solution:

V = 2 × 12 = 24 Volts

Frequently Asked Questions

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