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ASVAB · Circuits and Ohm's Law

According to Ohm's Law, what is the relationship between voltage (V), current (I), and resistance (R)?

Reviewed by Jordan Morley, Editorial Lead at 247SimpleTests. Written by the 247SimpleTests Editorial Team from the official source material cited on every question.

Correct answer

V = I × R

  1. A V = R ÷ I
  2. B V = I × R
  3. C V = I + R
  4. D V = I ÷ R

Why this is the answer

OHM'S LAW states V = I × R (Voltage = Current × Resistance). ASVAB Electronics Information tests this fundamental relationship. From it: I = V ÷ R (current = voltage ÷ resistance) and R = V ÷ I (resistance = voltage ÷ current).

Example: With 12 volts across a 4-ohm resistor, current = 12 ÷ 4 = 3 amps. Ohm's Law is the single most important formula in basic electronics and is very commonly tested. Memorize the triangle: V on top, I and R on the bottom (cover the one you want to find).

Source: ASVAB Electronics Information — Ohm's Law

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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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