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Science

Resistance

Resistors

a rectangle lying flat with two horizontal lines coming out of its sides

Resistor

A graph of current against potential difference shows you how the current flowing through a component varies with the potential difference across it.

A graph with current on the y axis and voltage on the x axis. A diagonal line goes through the graph at 45 degrees

A graph with current on the y axis and voltage on the x axis. A diagonal line goes through the graph at 45 degrees

The current flowing through a resistorresistor: An electrical component that restricts the flow of electrical current. Fixed-value resistors do not change their resistance, but with variable resistors it is possible to vary the resistance. at a constant temperature is directly proportional to the potential difference across it. This is the graph of current against potential difference for a resistor at constant temperature.

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