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Cambridge IGCSE Physics practice

Paper 6 structured question: Magnetic effect of a current

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Magnetic effect of a current

Exam-style question

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Paper 6Alternative to PracticalPractical1 marks

Observing the magnetic field pattern of a straight wire.

Results Table

Results of Magnetic Field Observations

A table showing the observations of magnetic field patterns around a straight wire at different distances.

Distance (cm)Field Strength (arbitrary units)
15
23
31.5
40.5
  1. a

    State the relationship between the distance from the wire and the magnetic field strength based on the results.

    Aim for approximately 1 distinct marking point.

    [1]

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Paper 6 structured question: Magnetic effect of a current

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Method

Method to Investigate Magnetic Field of a Solenoid

To investigate the magnetic field produced by a solenoid, you will need to set up the apparatus as follows: Wrap insulated wire around a cylindrical object to form a solenoid. Connect the ends of the wire to a power source. Use iron filings to visualize the magnetic field. Sprinkle the filings on a piece of paper placed over the solenoid and observe the pattern formed when current flows through the wire.

  1. a

    Describe the method you would use to ensure accurate measurements of the magnetic field strength in this experiment.

    Aim for approximately 3 distinct marking points.

    [3]