What this topic covers

Magnetic fields is topic 20 of the Cambridge 9702 syllabus (2025–2027), one of the broadest in the course. It covers the concept of a magnetic field, forces on current-carrying conductors and moving charges, fields due to currents, and electromagnetic induction. It is A Level content, examined in Paper 4 (A Level Structured Questions), which carries 38.5% of the A Level. Students struggle with three-dimensional reasoning using Fleming's left-hand rule, the precise definition of magnetic flux density, and the motion of charged particles in combined fields, including the Hall effect and velocity selection. Electromagnetic induction demands clear explanations using Faraday's and Lenz's laws and the concept of magnetic flux linkage. The breadth of this topic makes systematic topical practice particularly valuable.

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Questions in this topic

• 9702/41/O/N/24 Q7 — Magnetic fields and forces · 11 marks
• 9702/42/O/N/24 Q1 — circular motion and electromagnetic induction · 13 marks
• 9702/43/O/N/24 Q7 — Magnetic fields and forces · 11 marks
• 9702/42/M/J/24 Q7 — Electromagnetic induction · 14 marks
• 9702/43/M/J/24 Q5 — electric and magnetic fields · 13 marks
• 9702/41/O/N/23 Q6 — magnetic fields and forces · 12 marks
• 9702/41/O/N/23 Q8 — Photon momentum and pressure · 10 marks
• 9702/42/O/N/23 Q7 — Hall effect and electromagnetic induction · 11 marks
• 9702/43/O/N/23 Q6 — magnetic fields · 12 marks
• 9702/43/O/N/23 Q8 — Photon momentum and pressure · 10 marks
• 9702/41/M/J/23 Q6 — Magnetic fields and forces · 10 marks
• 9702/42/M/J/23 Q6 — Electromagnetic induction · 10 marks
• 9702/43/M/J/23 Q6 — Magnetic fields and forces · 10 marks
• 9702/42/F/M/23 Q6 — Hall effect and magnetic fields · 8 marks
• 9702/41/O/N/22 Q5 — Capacitor discharge and induced e.m.f. · 11 marks
• 9702/41/O/N/22 Q6 — Hall effect in semiconductors · 9 marks
• 9702/42/O/N/22 Q7 — magnetic flux density · 10 marks
• 9702/42/O/N/22 Q8 — Electromagnetic induction · 11 marks
• 9702/43/O/N/22 Q5 — Capacitor discharge and induced e.m.f. · 11 marks
• 9702/43/O/N/22 Q6 — Hall effect in semiconductors · 9 marks
• 9702/41/M/J/22 Q2 — electric and magnetic fields · 8 marks
• 9702/41/M/J/22 Q6 — Magnetic flux and induction · 11 marks
• 9702/42/M/J/22 Q6 — Magnetic fields and forces · 10 marks
• 9702/42/M/J/22 Q7 — Faraday's law and electromagnetic induction · 10 marks
• 9702/43/M/J/22 Q2 — electric and magnetic fields · 8 marks
• 9702/43/M/J/22 Q6 — Magnetic flux and induction · 11 marks
• 9702/42/F/M/22 Q6 — magnetic flux and induction · 7 marks
• 9702/41/O/N/21 Q8 — magnetic fields and forces · 6 marks
• 9702/41/O/N/21 Q9 — alternating voltage and electromagnetic induction · 9 marks
• 9702/42/O/N/21 Q8 — magnetic fields and forces · 5 marks

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