BRAINCAKEResistance Heating
The heating effect of a current is due to the resistance of the circuit.
The power P is the rate of energy transfer and is due to the current and the potential difference.
P = I V
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Key terms in this lesson
- 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 Direct Current Circuits
- Current Rules
- Potential Difference Rules
- Resistors in Series
- Resistors in Parallel
- Internal Resistance
- Power
- Measuring Internal Resistance
- Cells in Series
All 15 lessons in Direct Current Circuits · All AQA AS-level Physics topics