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What is the current through a 100-ohm resistor connected across 200 volts?

2 amperes.

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  1. 0.5 amperes
  2. 2 amperes ✔
  3. 100 amperes

Why: Use I = E divided by R. Two hundred volts divided by 100 ohms equals 2 amperes.

Huh, didn't know that: This resistor would dissipate 400 watts at those values.

The dad joke
Why was the 100-ohm resistor never lonely? At 200 volts it always had 2 amps for company.
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References

Answer: 2 amperes. Use I = E divided by R. Two hundred volts divided by 100 ohms equals 2 amperes.

  1. NCVEC 2026-2030 Technician Question Pool, T5D08 ncvec.org/downloads/2026-2030%20Technician%20Pool%20and%20Syllabus%20Public%20Release%20Feb%2019%202026.pdf
    C. 2 amperes
    Checked 2026-10-09.

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