Loading…
Loading…
GCSE Physics · key term
The energy transferred per unit charge between two points, measured in volts (V).
Used by OCR
Specification P4.2e, P4.2g · Paper 1 (Foundation), Paper 3 (Higher)
Revise: Electromagnetic inductionA current creates a magnetic field, but the link also works in another way: when the magnetic field around a conductor changes, a potential difference is induced across the conductor's ends. This process is called electromagnetic induction.
The energy transferred per unit charge between two points in a circuit, measured in volts (V).
State that it is a change in the magnetic field experienced by the conductor that induces a potential difference; a constant field produces no sustained induced p.d.
Distinguish carefully between an induced potential difference and an induced current: current flows only when the conductor forms a complete circuit.
Describe the causal chain in order: alternating current in the primary → changing magnetic field in the core → induced potential difference across the secondary → current if the secondary circuit is complete.
Create a free account to read GCSE Physics revision notes for your exam board and track your progress.