2.7 Magnetic Fields, Electromagnets and the Motor Effect
Magnetic poles and fields, current-generated fields, coils and cores, electromagnet strength, force on a current and Fleming's left-hand rule.
How to study for CCEA GCSE Physics
Link every equation to a physical model and unit, interpret graphs and evidence, and prepare each prescribed practical from method through evaluation.
Core concepts
Concept 1
Magnetic field lines show direction from north to south outside a magnet and field strength by their spacing.
Exam cue: Confirm the CCEA unit, tier and whether the task tests a model, calculation, explanation or practical judgement.
Concept 2
Current in a coil creates a magnetic field strengthened by increased current, more turns and a suitable core.
Exam cue: State which factor changes the field, use conventional current direction and keep field, current and force mutually perpendicular.
Concept 3
A current-carrying conductor in a magnetic field experiences a force whose direction follows Fleming's left-hand rule.
Exam cue: Show substitutions and units, connect evidence to the physical model and limit the conclusion to the stated conditions.
Risk pitfalls and guardrails
Using Fleming's generator rule for the motor effect or drawing field lines that cross.
Guardrail: Do not import an England board, Single Award or Double Award structure, and do not replace a causal physical explanation with an equation alone.
Importing an equation sheet, Higher-only boundary or paper convention from an England 9-1 board.
Guardrail: Use the current CCEA formatting to confirm Higher-only content and the correct paper duration; do not infer tier scope from another exam board.
Giving a calculator display or named law without the working, units, causal explanation or evidence the command word requires.
Guardrail: Do not import an England board, Single Award or Double Award structure, and do not replace a causal physical explanation with an equation alone.
Memory anchors
Magnetic field
A region where a magnetic material or current experiences a force.
Field line
A line showing magnetic-field direction and relative strength.
Solenoid
A coil of wire whose current produces a bar-magnet-like field.
Electromagnet
A current-produced magnet, commonly strengthened by an iron core.
Motor effect
Force on a current-carrying conductor placed in a magnetic field.
Fleming's left-hand rule
A rule linking field, current and force directions for the motor effect.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
Outside a bar magnet, which direction do magnetic field lines point?
What does closer spacing of magnetic field lines represent?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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