plumiFactors affecting induced e.m.f.: Edexcel International A Level Physics questions
Edexcel International A Level Physics past-paper questions on 4.4.4.1 Factors affecting induced e.m.f., 2019–2025, with mark schemes and examiner’s reports where available.
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Q18(a)
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Open the full PDFYour answerQ18(b)(i)
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All 16 questions on Factors affecting induced e.m.f., as a list
- June 2025, Unit 4, Q18(a) (4 marks): Explain how the mobile phone charges when placed near to the charger. (4)
- June 2025, Unit 4, Q18(b)(ii) (1 mark): The maximum potential difference across the coil connected to the digital voltmeter is less than the maximum potential difference of the a.c. supply. Suggest wh
- January 2025, Unit 4, Q6 (1 mark): Two coils, P and Q, are close to each other. An alternating supply is connected across coil P, as shown. coil P coil Q The number of turns on coil Q and the sep
- January 2025, Unit 4, Q18(a) (4 marks): Explain how the voltage sensor detects the orientation of the magnetic poles. (4)
- October 2024, Unit 4, Q15(b)(i) (2 marks): She pushes one side of the coil down quickly, so that the coil starts to rotate. Explain why a reading may be shown on the sensitive voltmeter. (2)
- June 2024, Unit 4, Q18(a) (3 marks): Explain how a p.d. is produced across the secondary coil when the switch is opened. (3)
- January 2024, Unit 4, Q21(a) (6 marks): The idea of the induction cooker was first suggested more than a century ago. An iron kettle was heated by passing an alternating current through a coil wound a
- January 2024, Unit 4, Q21(b) (2 marks): A manufacturer demonstrated the use of an induction cooker using a raw egg and a steel frying pan that had been cut in half, as shown. steel pan induction area
- October 2023, Unit 4, Q16 (6 marks): *16 A bar magnet was dropped vertically through a small coil, as shown. S bar magnet N coil The coil was attached to a data logger. The data logger recorded the
- June 2023, Unit 4, Q16(a) (2 marks): Explain why a p.d. was produced as the coil was rotated. (2)
- October 2022, Unit 4, Q10 (1 mark): Two coils, L and M, are placed next to each other as shown. L M An alternating e.m.f. is induced across coil M. Which of the following could produce this? A an
- June 2022, Unit 4, Q10 (1 mark): Two coils are linked by an iron core as shown. Coil 1 carries an alternating current I. iron core a.c. coil 1 coil 2 The graph shows the variation of I with tim
- June 2022, Unit 4, Q18(b)(i) (2 marks): Explain why a current was produced in the aluminium plate as it passed between the poles of the magnet. (2)
- June 2021, Unit 4, Q6 (1 mark): A coil of wire is connected to a resistor as shown. magnetic coil resistor field The magnetic flux density of the field through the coil is increased steadily f
- October 2020, Unit 4, Q15(b)(i) (6 marks): The transformer T consists of two coils wound around a single iron core. An alternating p.d. is applied to the input coil and the output coil is connected, thro
- January 2020, Unit 4, Q18(b)(ii) (2 marks): Explain the changes in the graph when the angular velocity of the coil is halved. (2)
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