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ASVAB · Circuits and Ohm's Law

If a circuit has 24 volts and a resistance of 6 ohms, what is the current?

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Correct answer

4 amps

  1. A 144 amps
  2. B 18 amps
  3. C 30 amps
  4. D 4 amps

Why this is the answer

The current is 4 amps. Using OHM'S LAW (I = V ÷ R): I = 24 volts ÷ 6 ohms = 4 amps. ASVAB Electronics Information tests Ohm's Law calculations. Rearranging V = I × R to solve for current: I = V ÷ R. Plug in the values: 24 ÷ 6 = 4. Always identify what you're solving for (current here) and use the correct form of the formula. These calculation questions are common — practice rearranging V = I × R to find any of the three quantities given the other two.
Source: ASVAB Electronics Information — Ohm's Law Calculation

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About this topic: Circuits and Ohm's Law

Circuits and Ohm's Law questions ask you to calculate voltage, current, resistance or power, and to understand series versus parallel circuits — how resistance adds in series and reduces in parallel, and what happens when one component fails. This is one of 17 Electronics Information questions on circuits and ohm's law, each with a full explanation on a single study page.

New to this exam? Our ASVAB exam guide explains the format, scoring, and how to prepare.

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