Question

what is the energy per unit charge provided by a source of electrical energy, such as a battery?
options:
current
power
electromagnetic force (emf)
resistance

Explanation:

Electromotive force (EMF) is defined as the energy per unit charge supplied by a source like a battery to drive electric charge around a circuit. Resistance is opposition to current, power is rate of energy transfer, and current is charge flow rate, none match the given definition.

Answer:

Electromagnetic force (EMF)