2024 · M/J · 5054/21 | Q6

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Question (6 of 8)9 marks · Practise this topic →

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The current in the coil causes the coil to rotate.

(a)(i)State what happens to the motor if a stronger magnet is used.

Fig. 6.1 — see the question text for what it shows

Answer guidance

State A short answer. No explanation is needed, and adding one cannot earn extra marks.

[1 mark]

On Fig. 6.1 mark and label:

• the direction of the current in the coil

(a)(ii)• the direction of the magnetic field.

[1 mark]

(a)(iii)Explain why the coil turns.

Answer guidance

Explain Give reasons, not just what happens. Each distinct reason is usually worth a mark.

[2 marks]

Two vertical wires carry equal currents in opposite directions. They pass at right angles through a piece of card.

On Fig. 6.3 sketch the pattern of the magnetic field produced.

(b)(i)Indicate the direction of the magnetic field on the pattern that you draw.

Fig. 6.2 — see the question text for what it shows

Fig. 6.3 — see the question text for what it shows

[3 marks]

Two vertical wires carry equal currents in opposite directions and pass at right angles through a piece of card. The currents in the two wires cause the wires to repel each other.

(b)(ii)Explain how the current in one wire causes a force on the other wire.

Answer guidance

Explain Give reasons, not just what happens. Each distinct reason is usually worth a mark.

[2 marks]

5054/21/M/J/24Cambridge O Level Physics 5054 · May/June 2024 · Paper 2 variant 1 · Question 6