Technician exam question T5C09
Subelement T5, ELECTRICAL PRINCIPLES· Group T5C
T5C09
How much power is delivered by a voltage of 13.8 volts DC and a current of 10 amperes?
- A.138 watts (correct answer)
- B.0.7 watts
- C.23.8 watts
- D.3.8 watts
WhyA voltage of 13.8 volts DC and a current of 10 amperes delivers 138 watts. Power equals current times voltage, so 10 amperes times 13.8 volts is 138 watts, answer A. B, C, and D don't come from multiplying the two given values correctly.
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.