Questions: Magnetism and electromagnetism
Pick a question type. Each time you get new numbers. Free ones are marked free.
Magnets and magnetic fields
- Attraction and repulsion between polesChoose, 1 mark, free
- Magnetic materialsChoose, 1 mark, free
- Permanent and induced magnetsChoose, 1 mark, free
- Reading magnetic field linesChoose, 1 mark, free
- Compasses and the Earth's fieldChoose, 1 mark, free
- Plotting a field with a compassDescribe, 4 marks, free
Electromagnetism
- The field around a wire and a solenoidChoose, 1 mark, free
- Right-hand grip rule: direction of the fieldChoose, 1 mark, free
- Which end of a solenoid is northChoose, 1 mark, free
- Making an electromagnet strongerChoose, 1 mark, free
- Uses of electromagnetsChoose, 1 mark, free
- How a relay worksExplain, 3 marks, free
- Turns and strength: results tableCalculate, 4 marks, free
The motor effect
- F = BIl: force on a wireCalculate, 3 marks, Plus, Higher tier
- F = BIl with mT and cmCalculate, 3 marks, Plus, Higher tier
- A tiny force in standard formCalculate, 3 marks, Plus, Higher tier
- Magnetic flux density from F = BIlCalculate, 3 marks, Plus, Higher tier
- Current from F = BIlCalculate, 4 marks, Plus, Higher tier
- Length of wire from F = BIlCalculate, 3 marks, Plus, Higher tier
- Force and current: a results tableComplete, 4 marks, Plus, Higher tier
- Direction of the force by Fleming's left-hand ruleChoose, 1 mark, Plus
- Direction of the current by Fleming's left-hand ruleChoose, 1 mark, Plus
- Changing the force on a wireChoose, 1 mark, Plus
- Changing the speed of a motorChoose, 1 mark, Plus
- Why a motor coil keeps turningChoose, 1 mark, Plus
Loudspeakers and induced potential difference
- How a loudspeaker movesChoose, 1 mark, Plus, Physics only
- Frequency of the sound from a loudspeakerCalculate, 4 marks, Plus, Physics only
- How a loudspeaker works (6 marks)Explain, 6 marks, Plus, Physics only
- What changes the size of an induced p.d.Choose, 1 mark, Plus, Physics only, Higher tier
- When is a p.d. induced?Choose, 1 mark, Plus, Physics only, Higher tier
- Direction of the induced currentChoose, 1 mark, Plus, Physics only, Higher tier
- The induced field opposes the changeChoose, 1 mark, Plus, Physics only, Higher tier
- Why the meter reads only while the magnet movesExplain, 3 marks, Plus, Physics only, Higher tier
Alternators, dynamos and microphones
- Peak, period and frequency from an alternator graphDetermine, 4 marks, Plus, Physics only, Higher tier
- Turning an alternator fasterDetermine, 4 marks, Plus, Physics only, Higher tier
- Alternator or dynamo from the output graphChoose, 1 mark, Plus, Physics only, Higher tier
- Slip rings, commutators and generatorsChoose, 1 mark, Plus, Physics only, Higher tier
- Turns per minute to frequency and periodCalculate, 3 marks, Plus, Physics only, Higher tier
- How a microphone worksChoose, 1 mark, Plus, Physics only, Higher tier
- How a moving-coil microphone works (6 marks)Explain, 6 marks, Plus, Physics only, Higher tier
Transformers
- Output p.d. from the turns ratioCalculate, 3 marks, Plus, Physics only, Higher tier
- Input p.d. from the turns ratioCalculate, 2 marks, Plus, Physics only, Higher tier
- Number of turns from the p.d.sCalculate, 2 marks, Plus, Physics only, Higher tier
- Currents in an ideal transformerCalculate, 3 marks, Plus, Physics only, Higher tier
- Turns ratio, then the currentCalculate, 5 marks, Plus, Physics only, Higher tier
- Step-up or step-down?Choose, 1 mark, Plus, Physics only, Higher tier
- How a transformer worksChoose, 1 mark, Plus, Physics only, Higher tier
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