WJEC A Level Physics
WJEC A Level Physics 4.4 Magnetic Fields Exam Questions
Free WJEC A Level Physics exam questions on 4.4 Magnetic Fields, with mark schemes. Covers force on a current and moving charge, field patterns, Hall effect and particle accelerators.
4.4 Magnetic Fields exam questions
1 question pack of real past exam questions with its mark scheme. Answer every question without notes, then mark your answers line by line against the mark scheme.
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A Level Physics Flashcards
Every answer is written in mark scheme wording, so you learn exactly what examiners give marks for. Pick your exam board, then test yourself with the questions on this page.
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About WJEC A Level Physics 4.4 Magnetic Fields
This topic covers magnetic forces.
What you need to know
- Force on a wire F = BIl sin θ.
- Force on a charge F = Bqv sin θ; circular paths.
- Field patterns Wires, solenoids and B = μ₀nI.
- Hall effect Hall voltage and probes; cyclotrons and accelerators.
Common mistakes in 4.4 Magnetic Fields
- Using the wrong hand rule.
- Forgetting the sin θ term.
- Saying magnetic forces do work on charges.
Try three 4.4 Magnetic Fields exam-style questions
1. Find the force on 0.20 m of wire carrying 3.0 A at right angles to 0.50 T. (1 mark)
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0.30 N.
2. Explain why a charged particle moves in a circle in a uniform field. (2 marks)
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Force is perpendicular to velocity (1), giving a centripetal force with constant speed (1).
3. State what the Hall voltage depends on. (1 mark)
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B, I and the charge carrier density.
4.4 Magnetic Fields FAQs
What does Magnetic Fields cover?
Forces on wires and charges, field patterns and the Hall effect.
Which practical links here?
Investigating the force on a current-carrying conductor.
What is a tesla?
The field giving 1 N on 1 m of wire carrying 1 A at right angles.
Revise this topic with flashcards: A Level Physics Flashcards, with mark scheme answers for Anki and Quizlet.
