Electrical Engineering › Section A · Introduction, current, and voltage › Topic A.5
Ammeters and voltmeters
Current and voltage are invisible, so every circuit you build, repair or test depends on meters. Connecting them the right way round, in the right place and on the right range is the first practical skill of electrical work.
In this topic
- Two quantities, two connections
- The ammeter
- The voltmeter
- Polarity and the meaning of a minus sign
- Worked example: measuring a torch circuit
- Ranges, resolution and counts
- Accuracy specifications
- Worked example: how good is the reading?
- Worked example: choosing a current range
- Using meters safely
- Common mistakes to avoid
- Key takeaways
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