Measuring voltage, current and resistance
Electrical Technology · Grade 10 · about 40 minutes
A bench practical: measure V and I on a 12 V lamp with calibrated meters, compute R, then check R with an ohmmeter on the disconnected lamp.
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- 7 sections of explanation, worked examples and diagrams
- 1 practice task with hints and worked answers
- A quiz that marks itself as you go
- Your progress kept across every subject you take
Other lessons in this sub-strand
- Measuring instruments
- The moving-coil movement
- Analogue and digital meters
- The ammeter
- Computing a shunt for an ammeter
- The voltmeter
- Computing a multiplier for a voltmeter
- The ohmmeter
- The multimeter
- Selecting a suitable scale and range
- Connecting meters in the workshop
- Calibrating coil-based instruments
- Measuring voltage, current and resistance
- Why measuring instruments matter