Electrical Engineering ⇒ Topic : Resistance of voltmeter
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David
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Resistance of voltmeter. A PMMC galvanometer in series with a high resistance (R) is called a PMMC voltmeter. Resistance of voltmeter = Rm+ R, Since the value of Rs is very large, the resistance of the voltmeter will be very high. Thus the series resistance R, has not only extended the voltage range but it has also increased the resistance of the voltmeter - a desirable requirement for a voltmeter | |
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