What is the test instrument used to measure current of electricity?

Prepare for the HVAC D-2 License Exam. Study with flashcards and multiple-choice questions. Each question comes with hints and explanations. Get ready for your HVAC certification!

Multiple Choice

What is the test instrument used to measure current of electricity?

Explanation:
Measuring the flow of electric current requires a device that carries the same current as the circuit. An ammeter is placed in series with the load, so all current passes through it and it reads the current in amperes. It’s designed with very low internal resistance to avoid altering the circuit’s current. In contrast, a voltmeter measures voltage and is connected in parallel across a component, an ohmmeter measures resistance, and a wattmeter measures power.

Measuring the flow of electric current requires a device that carries the same current as the circuit. An ammeter is placed in series with the load, so all current passes through it and it reads the current in amperes. It’s designed with very low internal resistance to avoid altering the circuit’s current. In contrast, a voltmeter measures voltage and is connected in parallel across a component, an ohmmeter measures resistance, and a wattmeter measures power.

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