Key Ideas
Resistance for ohmic and non-ohmic components is defined as the ratio of potential difference across the component to the current in the component.
The resistance of a conductor depends on its length, area of cross-section, temperature, and the type of the material of which it is composed.
Resistance is constant for ohmic resistors, which conform to Ohm’s Law.
Ohm’s Law
states that current is directly proportional to the potential difference providing the temperature of the conductor remains constant.
Lectures
Lecture - resistance
Videos
Resistors, FuseSchool
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