An unmarked resistor is being used in a circuit. To determine its resistance by making voltage and current measurements, one should connect
A) the voltmeter and ammeter in parallel with the resistor.
B) the voltmeter and ammeter in series with the resistor.
C) the voltmeter in series with the resistor, and the ammeter in parallel with the resistor.
D) the voltmeter in parallel with the resistor, and the ammeter in series with the resistor.

Question

Quizplus · Accepted Answer

To measure the resistance accurately, the voltmeter must be connected in parallel with the resistor to measure the voltage across it, and the ammeter must be connected in series with the resistor to measure the current flowing through it. This setup ensures that the voltage drop across the resistor and the current flowing through it are accurately measured, allowing for the calculation of resistance using Ohm's law (R = V/I).

An Unmarked Resistor Is Being Used in a Circuit