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What formula is used to calculate current in a circuit?

I = E / R.

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  1. I = E x R
  2. I = E / R ✔
  3. I = E2 x R

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

Huh, didn't know that: More resistance means less current when voltage stays constant.

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How does current feel about resistance? Less is more.
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References

Answer: I = E / R. Ohm's law gives current by dividing voltage by resistance. In symbols, I = E divided by R.

  1. NCVEC 2026-2030 Technician Question Pool, T5D01 ncvec.org/downloads/2026-2030%20Technician%20Pool%20and%20Syllabus%20Public%20Release%20Feb%2019%202026.pdf
    B. I = E / R
    Checked 2026-10-09.

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