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ASVAB · General

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

Correct answer

V = I × R

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

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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