Technician exam question T7D01
Subelement T7, PRACTICAL CIRCUITS· Group T7D
T7D01
Which instrument would you use to measure electric potential?
- A.An ammeter
- B.A voltmeter (correct answer)
- C.A potentiometer
- D.An ohmmeter
WhyA voltmeter is the instrument used to measure electric potential. A voltmeter is the instrument built to measure electric potential (voltage) between two points, answer B. An ammeter (A) measures current, a potentiometer (C) is an adjustable resistor, not a measuring instrument, and an ohmmeter (D) measures resistance, none of which measures voltage directly.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2026-2030 NCVEC Element 2 pool (public domain); the explanation above is original writing, see our methodology.
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