Cambridge IGCSE Physics
4.2.4Resistance
Resistance in Cambridge IGCSE Physics: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic13 practice questions1 lesson
Learning objectives
What the syllabus expects you to be able to do.
- 4.2.4.1Use R = V/I.
- 4.2.4.2Describe how to find a resistance with a voltmeter and an ammeter and do the calculation.
- 4.2.4.3State qualitatively how a metal wire's resistance depends on its length and cross-sectional area.
- 4.2.4.4Supplement: sketch and explain current-voltage graphs for a fixed resistor, a filament lamp and a diode.
- 4.2.4.5Supplement: use the facts that a metal conductor's resistance is proportional to its length and inversely proportional to its cross-sectional area.
Lessons
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Resistance and Ohm's law
32 min
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Sample question
A sample question on this topic. Answer it, check it, then read the worked answer.
Turn Resistance into a strength.
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