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4.5.3a Magnetic effect of a current and its applications

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Question 12

Three statements about an electromagnetic relay are given.

  1. The core inside the relay coil is typically made of a permanent magnet so that the switch remains closed after the control current is switched off.
  2. A small control current in the relay coil can be used to switch a much larger current on or off in a separate circuit.
  3. When current flows through the coil, the coil and its core act as a temporary magnet.

Which statements are correct?

A

1 and 2 only

B

1 and 3 only

C

2 and 3 only

D

1, 2 and 3

Markscheme

4.5.3a Magnetic effect of a current and its applications Questions

  1. IGCSE
  2. /Physics
  3. /4.5.3a Magnetic effect of a current and its applications

30 exam-style questions on CIE IGCSE Physics 4.5.3a Magnetic effect of a current and its applications. Each one has a worked solution and a mark scheme showing where the marks go.

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