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GCSEPhysicsOCRPhysics A (Gateway)Exam Questions4. Magnetism & Magnetic FieldsUses of Magnetism

Uses of Magnetism (OCR GCSE Physics A (Gateway)): Exam Questions

Exam code: J249

55 mins15 questions

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Uses of Magnetism

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

Choose your answer

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

Choose your answer

3
Sme Calculator1 mark

Higher Tier Only

A transformer has a primary coil and a secondary coil. The potential difference across the secondary coil is double the potential difference across the primary coil.

If the primary coil has 300 turns, how many turns are on the secondary coil?

  • 30

  • 150

  • 300

  • 600

Choose your answer

41 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

    Choose your answer

    51 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

    Choose your answer

    61 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?

      Choose your answer

      71 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.

      Choose your answer

      81 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

        Choose your answer

        91 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

        Choose your answer

        101 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

        Choose your answer