A practical voltmeter has an internal resistance rm. What is the value of rm if the meter reads 11.81 V when connected as shown in Figure P2.75. Assume VS = 12 V and RS = 25 k?.
Known quantities:
Voltage read at the meter; schematic of the circuit shown in Figure P2.75 with source voltage, and source resistance, .
Find:
The internal resistance of the voltmeter.
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