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What formula is used to calculate voltage in a circuit?

E = I x R.

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  1. E = I / R
  2. E = I2 x R
  3. E = I x R ✔

Why: Ohm's law gives voltage by multiplying current by resistance. In symbols, E = I x R.

Huh, didn't know that: One ampere through one ohm produces a one-volt drop.

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How does Ohm's law find voltage? It multiplies its chances.
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References

Answer: E = I x R. Ohm's law gives voltage by multiplying current by resistance. In symbols, E = I x R.

  1. NCVEC 2026-2030 Technician Question Pool, T5D02 ncvec.org/downloads/2026-2030%20Technician%20Pool%20and%20Syllabus%20Public%20Release%20Feb%2019%202026.pdf
    A. E = I x R
    Checked 2026-10-09.

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