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4.5.3a Magnetic effect of a current and its applications

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Question 17

Two electromagnets, P P\,P and QQQ, are constructed. Under testing, electromagnet P P\,P is found to lift a larger mass of steel paperclips than electromagnet QQQ.

Three suggestions are made to explain this observation:

  1. The electrical current flowing through the coil of electromagnet P P\,P is greater than that in electromagnet QQQ.
  2. The number of turns of wire in the coil of electromagnet P P\,P is greater than that in electromagnet QQQ.
  3. Electromagnet P P\,P has a soft iron core, whereas electromagnet Q Q\,Q has a non-magnetic plastic core of the same size.

Which suggestions provide a valid explanation for the observation?

A

1 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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