An ohmmeter is used to measure which in an electrical circuit?

An ohmmeter is used to measure which in an electrical circuit?

• A. Voltage
• B. Capacitance
• C. Resistance and continuity
• D. Temperature

Answer: (C)

An ohmmeter is used to measure resistance and check continuity in a circuit. It injects a small current from its internal battery and measures the resulting voltage drop, then uses Ohm’s law (R = V/I) to determine resistance. If the path is complete and can carry current, the reading is a low resistance and often the meter will indicate continuity with an audible beep or a light. If there’s a break, the resistance climbs toward infinity, signaling an open circuit. This capability makes it ideal for verifying that wires or components are connected and for finding faults. It doesn’t measure voltage—that’s what a voltmeter does—and it isn’t used to measure temperature. Capacitance requires a different method or instrument designed to assess how a component stores charge, not the steady DC resistance. Always de-energize the circuit before measuring resistance or continuity to avoid inaccurate readings or damage.

An ohmmeter is used to measure resistance and check continuity in a circuit. It injects a small current from its internal battery and measures the resulting voltage drop, then uses Ohm’s law (R = V/I) to determine resistance. If the path is complete and can carry current, the reading is a low resistance and often the meter will indicate continuity with an audible beep or a light. If there’s a break, the resistance climbs toward infinity, signaling an open circuit. This capability makes it ideal for verifying that wires or components are connected and for finding faults.

It doesn’t measure voltage—that’s what a voltmeter does—and it isn’t used to measure temperature. Capacitance requires a different method or instrument designed to assess how a component stores charge, not the steady DC resistance. Always de-energize the circuit before measuring resistance or continuity to avoid inaccurate readings or damage.