Magnetism and Electromagnetism Exam Practice

This lesson brings together all the key concepts from Topic 8: Magnetism and Electromagnetism in the Edexcel GCSE Physics specification (1PH0) and focuses on exam technique, key equations, common question types, and multi-step worked problems. Use this as your final revision before the exam.

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Key Equations to Learn

Equation	Meaning	Units
F = BIl	Force on a current-carrying conductor in a magnetic field (Higher)	F in N, B in T, I in A, l in m
Vp / Vs = Np / Ns	Transformer equation — relates voltage and turns	V in V, N = number of turns (no unit)
VpIp = VsIs	Power conservation in an ideal transformer (Higher)	V in V, I in A
P = I²R	Power dissipated (used for National Grid energy loss calculations)	P in W, I in A, R in Ω