An ohmmeter is used to measure...

An ohmmeter is used to measure...

• A. Resistance
• B. Voltage
• C. Current
• D. Capacitance

Answer: (A)

An ohmmeter measures resistance. It works by passing a small current through the component and measuring the resulting voltage (or applying a known voltage and measuring the current) to determine resistance with Ohm’s law, R = V/I. Because the meter injects its own signal, the circuit must be powered off and the component isolated for an accurate reading. This lets you distinguish resistance from voltage (read with a voltmeter), current (read with an ammeter), or capacitance (measured with instruments that assess charging or impedance of a capacitor).

An ohmmeter measures resistance. It works by passing a small current through the component and measuring the resulting voltage (or applying a known voltage and measuring the current) to determine resistance with Ohm’s law, R = V/I. Because the meter injects its own signal, the circuit must be powered off and the component isolated for an accurate reading. This lets you distinguish resistance from voltage (read with a voltmeter), current (read with an ammeter), or capacitance (measured with instruments that assess charging or impedance of a capacitor).