Red Seal Electrician Practice
AC theoryQuestion 994 of 1506

Which form of a complex result matches what a meter reads in a real AC circuit?

  1. Polar form
  2. Rectangular form
  3. Either form shows only the phase angle
  4. Neither form
Show answer

Correct answer: Polar form

Polar magnitude equals the measured value and the angle gives the phase shift. Rectangular form is only a tool for adding and subtracting.

Source: Lessons in Electric Circuits II: AC (Kuphaldt), 5.6: R, L and C Summary

Practice ac theory

Questions last reviewed: 18 October 2026