In measuring a voltage, a voltmeter uses some current from the circuit. Consequently, the voltage measured is only an approximation to the voltage present when the voltmeter is not connected. Consider a circuit consisting of two 1620-O resistors connected in series across a 61.8-V battery.
(a) Find the voltage across one of the resistors.
V

(b) A voltmeter has a full-scale voltage of 61.8 V and uses a galvanometer with a full-scale deflection of 4.75 mA. Determine the voltage that this voltmeter registers when it is connected across the resistor used in part (a).
V