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← Combined Science notes
Edexcel ·Combined Science·Cambridge IGCSE Combined Science

Electricity & Magnetism

15 min read

Current, voltage and resistance, series and parallel circuits, electrical power, and magnetism and electromagnetism.

Electric current and charge

Current (III, amperes) is the rate of flow of charge: I=QtI = \dfrac{Q}{t}I=tQ​. Potential difference (voltage, V) is the energy transferred per unit charge.

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