What is electric potential difference?

Electric potential difference (voltage) between two points is the work done per unit positive charge in moving it from one point to another.

Formula: V = W/q or V_AB = V_A − V_B

• Drives current through a circuit.
• Measured by a voltmeter connected in parallel.
• 1 Volt = 1 Joule per Coulomb.

Ohm's Law connection: V = IR

Electric potential difference (voltage) is the energy per unit charge between two points and is the driving force behind electric current.