Electricity Mind Map

Electric current is the rate at which electric charge flows through a conductor.

Always write the unit as ampere and use I = Q/t in numerical questions.

Potential difference is the work done per unit charge between two points in a circuit.

Remember that voltage is always between two points, not at a single point alone.

Resistance is the opposition offered by a conductor to the flow of electric current.

Remember: longer wire means more resistance, and thicker wire means less resistance.

Ohm's law states that at constant temperature, the current through a conductor is directly proportional to the potential difference across it.

Always check that the question says constant temperature before using the law directly.