Red Seal Electrician Practice
DC circuitsQuestion 1317 of 1506

A 120 V supply feeds a resistive load of 30 Ω. What current flows in the circuit?

  1. 90.0 A
  2. 0.250 A
  3. 4.00 A
  4. 6.93 A
Show answer

Correct answer: 4.00 A

I = V ÷ R = 120 V ÷ 30 Ω = 4.00 A.

Source: Computed, 2.1: Ohm’s Law - How Voltage, Current, and Resistance Relate

Practice dc circuits

Questions last reviewed: 18 October 2026