Suppose an ammeter and voltmeter are used to determine a resistor’s resistance. If the ammeter is connected in series with the resistor and the voltmeter is connected across the resistor only, show that the correct resistance of the resistor is given by R V/[I - (V/R_V)], where V is the voltage measured by the voltmeter, I is the current measured by the ammeter, and R_V is the internal resistance of the voltmeter.