Tag: systematic error

Dec 27 2014

Ammeters and Internal Resistance

Question: Based on your previous post regarding voltmeters and internal resistance, I can safely assume that an ammeter must also have some internal resistance. What effect does this resistance have on current measurements, and what resistance value would minimize any error it introduces to the reading? Answer: It is indeed true that an ammeter must …

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Nov 24 2014

Voltmeters and Internal Resistance

Simple resistive circuit with voltmeter

Question:¬†Does a voltmeter have any internal resistance, and if so, what, if any, affect does it have on voltage readings? Answer: Even if you have no electrical experience at all, I would hope that your answer to the first part of the question was, “yes.” Otherwise this would turn out to be an incredibly short …

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