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Physics 0625

4. Electricity and magnetism

Magnets and fields, charge and current, circuits and components, electrical safety, and electromagnetic effects.

  1. 4.1

    Simple phenomena of magnetism

    Magnetic materials, magnetic fields and field lines, and induced magnetism.

    Full lesson2 questions5 cards
    • 4.1.1Describe the forces between magnetic poles and identify magnetic materials.
    • 4.1.2Draw the magnetic field pattern around a bar magnet, including direction.
    • 4.1.3Distinguish between the properties of permanent magnets and electromagnets.
  2. 4.2

    Electrical quantities

    Charge, current, potential difference, resistance, Ohm's law and electrical energy and power.

    Full lesson2 questions5 cardsSimulationReview first: 1.7
    • 4.2.1Define current as charge per unit time and recall and use I = Q / t.
    • 4.2.2Define potential difference as energy transferred per unit charge and recall and use V = W / Q.
    • 4.2.3Recall and use V = IR and describe an experiment to determine resistance.
    • + 2 more objectives
  3. 4.3

    Electric circuits

    Circuit diagrams, series and parallel circuits, combined resistance, and action of components.

    Full lesson3 questions4 cardsSimulationReview first: 4.2
    • 4.3.1Draw and interpret circuit diagrams using standard symbols.
    • 4.3.2Describe how current and potential difference are distributed in series and parallel circuits.
    • 4.3.3Calculate the combined resistance of resistors in series and in parallel.
    • + 1 more objectives
  4. 4.4

    Electrical safety

    Hazards of electricity, fuses, circuit breakers, earthing and double insulation.

    Full lesson2 questions5 cardsReview first: 4.2
    • 4.4.1Identify electrical hazards including damaged insulation, overheating cables, damp conditions and excess current.
    • 4.4.2Explain the use of fuses, circuit breakers and earthing in domestic circuits.
  5. 4.5

    Electromagnetic effects

    Electromagnetic induction, the a.c. generator, transformers, the magnetic effect of a current, and the motor effect.

    Full lesson3 questions5 cardsSimulationReview first: 4.1, 4.2
    • 4.5.1Describe an experiment to demonstrate electromagnetic induction and state the factors affecting the size of the induced e.m.f.
    • 4.5.2Describe the construction and action of a simple a.c. generator.
    • 4.5.3Describe the structure and use of a transformer and recall and use Vp/Vs = Np/Ns.
    • + 1 more objectives