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Energy Transfer

The electrical power is the energy transferred per unit time by the charge carriers to the component.(the rate of energy transfer).
P=W
 t
 =W × Q
Q      t
P=V I
watts=volts × amps
The energy transferred:
Energy = V I t

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Specification: AQA Physics (7407), AS-level, 3.5.1.2 Current-voltage characteristics and 3.5.1.1 Basics of electricity. Topic: Electric Current.

Key terms in this lesson

Electromotive force
The electrical energy produced per unit charge by a source, such as a cell, in driving current around a circuit.
Potential difference
The energy transferred per unit charge as charge moves between two points in a circuit.
Resistance
The ratio of the potential difference across a component to the current flowing through it, measured in ohms.

More in Electric Current

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