How a galvanometer is convereted into a voltmeter and a ammeter?
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https://www.meritnation.com/ask-answer/question/how-can-a-moving-coil-galvanometer-converted-into-an-ammeter/current-electricity/7040030
https://www.meritnation.com/ask-answer/question/how-can-a-moving-coil-galvanometer-converted-into-an-ammeter/current-electricity/7040030