Which instrument is used to measure current in a circuit?

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Multiple Choice

Which instrument is used to measure current in a circuit?

Explanation:
Measuring current in a circuit requires placing the instrument in series with the circuit so the same current flows through both the circuit and the meter. An ammeter is designed with very low internal resistance, so it doesn’t significantly affect the current and can read the current in amperes. The voltmeter, by contrast, is connected in parallel and has high resistance to avoid drawing current; an ohmmeter measures resistance by injecting a small current and is used on de-energized circuits; a continuity tester checks for a complete path with a simple indicator rather than measuring actual current. So the instrument used to measure current is the ammeter.

Measuring current in a circuit requires placing the instrument in series with the circuit so the same current flows through both the circuit and the meter. An ammeter is designed with very low internal resistance, so it doesn’t significantly affect the current and can read the current in amperes. The voltmeter, by contrast, is connected in parallel and has high resistance to avoid drawing current; an ohmmeter measures resistance by injecting a small current and is used on de-energized circuits; a continuity tester checks for a complete path with a simple indicator rather than measuring actual current. So the instrument used to measure current is the ammeter.

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