Technician exam question T5C11
Subelement T5, ELECTRICAL PRINCIPLES· Group T5C
T5C11
How much current is required to deliver 120 watts at a voltage of 12 volts DC?
- A.0.1 amperes
- B.10 amperes (correct answer)
- C.12 amperes
- D.132 amperes
WhyDelivering 120 watts at a voltage of 12 volts DC requires 10 amperes of current. Current equals power divided by voltage, so 120 watts divided by 12 volts is 10 amperes, 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.