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Syllabus topic

Basic Electricity & Electronics

Voltage, current, resistance and power — the arithmetic every other topic depends on.

Practise this topic
20% of the exam0 questions in the bank

Sub-topics

  • Units & Quantities

    Volts, amperes, ohms, watts, farads, henries, hertz and the metric prefixes that scale them.

  • Ohm's Law & Power

    Relating voltage, current and resistance, and calculating dissipated power.

  • Series & Parallel Circuits

    Combining resistors, capacitors and inductors, and what happens to voltage and current in each arrangement.

  • Electrical Measurements

    Ammeters, voltmeters, multimeters, decibels and reading instruments correctly.

Lessons

  • Ohm's Law without the panic

    One relationship, three rearrangements, and the power formulas that fall out of it. This is the most reliable source of marks in the whole paper.

    8 min