GCSEPhysicsOCR GatewayTopic Questions4. Magnetism & Magnetic Fields4.2 Uses of Magnetism

Uses of Magnetism (OCR Gateway GCSE Physics)

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11 mark

Higher Tier Only

A student inserts a magnet into a coil of wire.

q8-paper3-oct-nov2020-ocr-gcse-physics

What is induced across the ends of the coil of wire?

  • Charge

  • Magnetism

  • Potential difference

  • Resistance

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21 mark

Higher Tier Only

A wire is placed between the poles of a magnet, perpendicular to the magnetic field lines.

q11-paper3-oct-nov2020-ocr-gcse-physics

Which direction will the wire move when a current flows?

  • Down

  • Left

  • Right

  • Up

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11 mark

Higher Tier Only

A wire is placed inside a horseshoe magnet.

q7-paper3-june2018-ocr-gcse-physics

Which direction will the wire move when the switch is closed?

  • Downwards

  • Left

  • Right

  • Upwards

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21 mark

Higher Tier Only

What output voltage does the transformer produce?

q8-paper3-june2018-ocr-gcse-physics

  • 0.2 V

  • 0.4 V

  • 5 V

  • 10 V

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11 mark

Higher Tier Only

A student measures the magnetic flux density around a current-carrying conductor at increasing distances from the conductor.

She plots her results.

q4-1-paper3-specimen-ocr-gcse-physics

The current in the conductor is decreased and a new graph plotted.

Which is the correct graph?

q4-2-paper3-specimen-ocr-gcse-physics

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21 mark

Higher Tier Only

The diagram shows two poles of a magnet.

q10-paper3-specimen-ocr-gcse-physics

X is the position of a wire carrying a current perpendicularly into the paper.

Which direction does the wire move?

  • downwards arrow

  • rightwards arrow

  • leftwards arrow

  • upwards arrow

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31 mark

Higher Tier Only

A 0.5 m length of wire is placed inside four different magnetic fields.

Magnetic Field Force on wire (N) Current in wire (A)
A 2.0 0.1
B 2.0 0.2
C 4.0 0.1
D 4.0  0.4


Which magnetic field has the greatest magnetic flux density?

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41 mark

Higher Tier Only

This is a diagram of a transformer used in the national grid.

q13-paper4-june2098-ocr-gcse-physics

Why is this transformer used in the national grid?

  • To decrease the power in the national grid by a factor of 20.

  • To decrease the power loss in the national grid by a factor of 400.

  • To increase the power in the national grid by a factor of 20.

  • To increase the power loss in the national grid by a factor of 400.

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51 mark

Higher Tier Only

Which of the following graphs shows the typical output potential difference, Vout, for a dynamo?

q9-paper3-oct-nov2020-ocr-gcse-physics

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