Electrical Math

Which of the following Ohms Law formulas is incorrect?

Answer

I = R / E

Ohm's law is I = E / R. Writing it as I = R / E is incorrect; current equals voltage divided by resistance.

Source: FCC Element 3 question pool, 3B

Not the answer

  • R = E / I
  • I = E / R
  • E = I x R

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The FCC Element 3 (General Radiotelephone) exam is 100 questions and takes 75 correct — 75% — to pass. Element 1, the other half of the licence, is 24 questions and takes 18 correct. The app’s page carries a free ten-question test drawn from the same bank, marked as you go.

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