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Magnetism and the motor effect

Edexcel GCSE PhysicsTopic 12 of 1514 lessons

Revision notes for Magnetism and the motor effect in Edexcel Physics (1PH0). Every lesson in BrainCake comes with R.E.C.I.P.E. recall steps, a quick check and spaced reviews.

  1. Recall that unlike magnetic poles attract and like magnetic poles repelEvery magnet has two ends called poles.
  2. Describe the uses of permanent and temporary magnetic materials including cobalt, steel, iron and nickelOnly a few metals are magnetic.
  3. Explain the difference between permanent and induced magnetsA permanent magnet produces its own magnetic field all the time.
  4. Describe the shape and direction of the magnetic field around bar magnets and for a uniform field, and relate the strength of the field to the concentration of linesA magnetic field is the region around a magnet where another magnet or a magnetic material feels a force.
  5. Describe the use of plotting compasses to show the shape and direction of the field of a magnet and the Earth’s magnetic fieldA plotting compass is a very small magnetic compass.
  6. Explain how the behaviour of a magnetic compass is related to evidence that the core of the Earth must be magneticA magnetic compass has a needle that is a small magnet.
  7. Magnetic field around a straight wireA current in a wire creates a magnetic field around the wire.
  8. Strength of the field around a wireThe magnetic field around a long straight wire is not the same strength everywhere.
  9. Solenoids and electromagnetsA solenoid is a long coil of wire.
  10. Force on a conductor near a magnetWhen a wire carrying a current is placed in the magnetic field of a magnet, the wire experiences a force.
  11. Forces from interacting magnetic fieldsA current in a wire creates its own magnetic field.
  12. Fleming's left-hand ruleFleming's left-hand rule tells you the direction of the force on a current-carrying conductor in a magnetic field.
  13. Force on a conductor in a magnetic field (F = B I l)A wire carrying a current in a magnetic field can feel a force.
  14. The electric motorA wire that carries a current in a magnetic field feels a force.

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