A resistance is measured by the ammeter-voltmeter method

Posted on 2014-02-21 15:59:00 in Physics by NAAPA

A resistance is measured by the ammeter-voltmeter method. With the voltmeter method connected across the resistance the readings on the ammeter and voltmeter are 0.4 A and 3.2 volts respectively. The resistance of the voltmeter is 500 ?. Calculate (a) the true value of resistance and (b) the percentage error in the value of resistance if the voltmeter current is ignored.

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