The amount of energy transferred by can be determined by ...

Power and time

Explanation:

Given the power of an appliance, the energy transferred is given as the product of power and time. Normally, power is defined as the rate of energy transfer per unit time in a circuit and expressed as

P=E/t

Making E the subject of the formula then

E=Pt

Where P is power, E is energy transfer and t is time.

Clearly, energy transfer is determined by power of an appliance and time.