Meters and troubleshootingQuestion 1025 of 1506

A phase sequence detector has two equal lamps and a capacitor. What does the circuit use to show the sequence?

Which of the two lamps is brighter
How fast the lamps flicker
The reading of an ammeter
Whether the capacitor gets warm

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Correct answer: Which of the two lamps is brighter

The capacitor phase shift makes one lamp dim and the other bright, and the sequence reverses which is which.

Source: Lessons in Electric Circuits II: AC (Kuphaldt), 7.3: Phase Rotation

Questions last reviewed: 18 October 2026

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