Course content

66 lessons

4.1 · Simple magnetism and magnetic fields

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4.2.1-4.2.4 · Electrical quantities

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Electric fields

14m

Electric current

14m

Measuring current with an ammeter

14m

Direct current and alternating current

12m

Electromotive force (e.m.f.)

10m

Potential difference and voltmeters

10m

Resistance

10m

Measuring resistance

15m

Current-voltage graphs

10m

Resistance of a wire: length and cross-sectional area

10m

Electrical quantities: practice

Electrical quantities: exam practice

15m

Electrical quantities: summary

4.3.1-4.3.3 · Electric circuits

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4.4.1-4.4.2 · Practical electricity

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4.5.3-4.5.5 · Magnetic effect of a current, forces and the d.c. motor

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4.5.1-4.5.2, 4.5.6, 4.6 · Electromagnetic induction, the transformer and the oscilloscope

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4.2.1-4.2.4 · Electrical quantitiesLesson 2 of 15Free preview

Conductors and insulators

Metals have free electrons, so charge moves through them. Plastic holds its electrons tightly.