NCCER Introduction to Electrical Circuits (26103-23) Practice Test 2026 - Free Electrical Circuits Practice Questions and Study Guide

Power in an electrical circuit is found by multiplying voltage by current. With a 240 V source and 10 A of current, the power is P = V × I = 240 × 10 = 2,400 watts. This is the amount of electrical power being delivered by the source for this setup. The other numbers would require different current or voltage values (for example, 24,000 W would need ten times more current at the same voltage, or a much higher voltage; 400 W would be about 1.67 A at 240 V; 240 W would be 1 A at 240 V), but given the provided values, the correct power is 2,400 watts.