To measure the potential difference across a resistor in an electric circuit, a voltmeter should be connected
A) in parallel with the resistor.
B) in series with the resistor.
C) either in parallel or in series with the resistor, depending on the geometry of the circuit.
D) neither in parallel nor in series with the resistor because the potential difference cannot be measured with a voltmeter.

Question

Quizplus · Accepted Answer

Voltmeters are designed to measure the potential difference (voltage) across two points in a circuit without significantly altering the circuit itself. To accurately measure the voltage across a resistor, a voltmeter must be connected in parallel with that resistor. This configuration allows the voltmeter to measure the potential difference directly across the resistor without affecting the current flowing through the resistor.

To Measure the Potential Difference Across a Resistor in an Electric