Technician exam question T5D10
Subelement T5, ELECTRICAL PRINCIPLES· Group T5D
T5D10
What is the voltage across a 2-ohm resistor if a current of 0.5 amperes flows through it?
- A.1 volt (correct answer)
- B.0.25 volts
- C.2.5 volts
- D.1.5 volts
WhyA 2-ohm resistor with a current of 0.5 amperes flowing through it has a voltage of 1 volt across it. Ohm's law gives voltage as current multiplied by resistance: 0.5 amperes times 2 ohms works out to 1 volt, answer A. B, C, and D don't match that multiplication.
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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