Technician exam question T5D04
Subelement T5, ELECTRICAL PRINCIPLES· Group T5D
T5D04
What is the resistance of a circuit in which a current of 3 amperes flows when connected to 90 volts?
- A.3 ohms
- B.30 ohms (correct answer)
- C.1/30 ohm
- D.270 ohms
WhyA circuit in which a current of 3 amperes flows when connected to 90 volts has a resistance of 30 ohms. Ohm's law gives resistance as voltage divided by current: 90 volts divided by 3 amperes works out to 30 ohms, answer B. A, C, and D don't match that division.
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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