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12.1 Magnets and magnetic fields

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Question 13

An engineering team is developing an electromagnetic switching system. The design requires two distinct components:

  1. A solenoid core that magnetises easily when a current is applied and demagnetises rapidly when the current is switched off, to minimise energy loss.
  2. A latching pin that must retain a strong, permanent magnetic field to hold a lever in place after the energising current has ceased.

Which combination of materials is most suitable for these two components?

A

Component 1: Steel; Component 2: Iron

B

Component 1: Iron; Component 2: Steel

C

Component 1: Iron; Component 2: Aluminium

D

Component 1: Copper; Component 2: Steel

Markscheme

12.1 Magnets and magnetic fields Questions

  1. GCSE
  2. /Physics
  3. /12.1 Magnets and magnetic fields

30 exam-style questions on Edexcel GCSE Physics 12.1 Magnets and magnetic fields, covering 12.1.1 Magnetic poles, 12.1.2 Magnetic materials; permanent and induced magnets, 12.1.3 Magnetic fields, and 12.1.4 Plotting compasses and the Earth's magnetic field. Each one has a worked solution and a mark scheme showing where the marks go.

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