In principle, when used together, an ammeter and voltmeter allow for the measurement of the resistance of
Question:
(a) Sketch this circuit (with instruments connected) and use it to explain why the correct resistance is not given by R = V/I, where V is the voltmeter reading and I is the ammeter reading.
(b) Show that the actual resistance of the element is larger than the result in part (a) and is instead given by R = V / I – (V/Rv), where Rv is the resistance of the voltmeter.
(c) Show that the result in part (b) reduces to R = V/I for an ideal voltmeter.
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