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Why is it that while using a moving coil galvanometer as a voltmeter a high resistance in series is required whereas in an ammeter a shunt is used?

Posted by Hiba Rafeek 1 year, 1 month ago

CBSE > Class 12 > Physics

1 answers

Adithya Dev 1 year, 1 month ago

Ammeter is required to be used to detect the current flowing through it. So, it is important to maintain it with as low as possible and thus, a shunt resistance is used and that too in parallel. But, in the case of voltmeter, the voltage across two points in the circuit is detected using it, so there is no requirement that current must be passed through it but it is necessary to maintain it at infinite resistance if possible. So, it is connected with high resistance in series.

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CBSE > Class 12 > Physics