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What is the voltage across a 10-ohm resistor if a current of 2 amperes flows through it?

20 volts.

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  1. 8 volts
  2. 12 volts
  3. 20 volts ✔

Why: Use E = I x R. Two amperes multiplied by 10 ohms gives 20 volts.

Huh, didn't know that: This combination represents 40 watts of power.

The dad joke
Why did 2 amps and 10 ohms win the talent show? They brought 20 volts of energy.
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References

Answer: 20 volts. Use E = I x R. Two amperes multiplied by 10 ohms gives 20 volts.

  1. NCVEC 2026-2030 Technician Question Pool, T5D12 ncvec.org/downloads/2026-2030%20Technician%20Pool%20and%20Syllabus%20Public%20Release%20Feb%2019%202026.pdf
    D. 20 volts
    Checked 2026-10-09.

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