Ammeters and voltmeters

Real ammeters and voltmeters are close to perfect but not ideal. On this page you will find out how ammeters and voltmeters are optimised for use. 


Essentials

Ammeters

Ammeters measure current and are connected in series. Therefore, the resistance of a perfect ammeter should be as low as possible (ideal: zero). 

Voltmeters

Voltmeters measure potential difference and are connected in parallel. Therefore, the resistance of a perfect voltmeter should be as high as possible (ideal: infinte). 

What are the effects of non-ideal voltmeters in a circuit?

Test Yourself

Use quizzes to practise application of theory. 


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Exam-style Questions

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