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Electrical mathQuestion 155 of 1506

A vector has the rectangular form 6, j8. What is its polar form?

  1. 10 @ 53.1°
  2. 10 @ 36.9°
  3. 14 @ 53.1°
  4. 14 @ 36.9°
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Correct answer: 10 @ 53.1°

Magnitude = √(36 + 64) = 10. The angle is arctan(8 ÷ 6) = 53.1°, and quadrant 1 uses the calculated angle.

Source: Trigonometry and Single Phase AC Generation for Electricians (Flinn), 2.4: Vector Addition

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Questions last reviewed: 18 October 2026