OCR A Level Physics B (Advancing Physics)
OCR A Level Physics B (Advancing Physics) Electromagnetism Exam Questions
Free OCR A Level Physics B (Advancing Physics) exam questions on Electromagnetism, with mark schemes. Covers magnetic flux, flux linkage, induction, transformers and generators.
Electromagnetism exam questions
These packs of real past exam questions cover the whole of Module 6: Field and Particle Physics, including Electromagnetism. Work through every question on this sub-topic, then mark your answers 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 OCR A Level Physics B (Advancing Physics) Electromagnetism
This sub-topic covers electromagnetic machines.
What you need to know
- Flux Φ = BA and flux linkage NΦ.
- Induction Faraday's and Lenz's laws.
- Machines Generators, motors and transformers.
- Magnetic circuits Permeance and iron cores.
Common mistakes in Electromagnetism
- Mixing flux and flux density.
- Saying transformers step up power.
Try three Electromagnetism exam-style questions
1. State Lenz's law. (1 mark)
Show the mark scheme answer
The induced emf opposes the change producing it.
2. Find the emf if NΦ changes by 0.40 Wb in 0.20 s. (1 mark)
Show the mark scheme answer
2.0 V.
3. Explain why transformer cores are laminated. (1 mark)
Show the mark scheme answer
To reduce eddy currents.
Electromagnetism FAQs
What does this cover?
Flux, induction and electrical machines.
Which practical links here?
Investigating induced emf.
Why use iron cores?
They increase flux linkage.
Revise this topic with flashcards: A Level Physics Flashcards, with mark scheme answers for Anki and Quizlet.
