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What is the current through a 24-ohm resistor connected across 240 volts?

10 amperes.

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  1. 0.1 amperes
  2. 2400 amperes
  3. 10 amperes ✔

Why: Use I = E divided by R. Two hundred forty volts divided by 24 ohms equals 10 amperes.

Huh, didn't know that: At 240 volts and 10 amperes, that resistor would use 2,400 watts.

The dad joke
Why did 240 volts get along with 24 ohms? They clicked by a factor of ten.
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References

Answer: 10 amperes. Use I = E divided by R. Two hundred forty volts divided by 24 ohms equals 10 amperes.

  1. NCVEC 2026-2030 Technician Question Pool, T5D09 ncvec.org/downloads/2026-2030%20Technician%20Pool%20and%20Syllabus%20Public%20Release%20Feb%2019%202026.pdf
    C. 10 amperes
    Checked 2026-10-09.

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