What term describes a circuit that uses more than one phase of alternating current?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $24.99Unlock all

Study for the MTA Electrical Test. Use our flashcards and multiple choice questions to prepare, each question includes hints and explanations. Achieve success on your exam!

Multiple Choice

What term describes a circuit that uses more than one phase of alternating current?

Explanation:
Polyphase is the term for a circuit that uses more than one phase of alternating current. In practice, power systems often run on three-phase power, where three AC waveforms are offset by 120 degrees. This arrangement provides smoother voltage, reduced vibrations in motors, and more efficient, balanced power delivery for traction and other equipment. The other terms don’t describe multiple phases: polarity is about which end is positive, phase difference is the angle offset between phases, and power is the rate of energy transfer, not the number of AC phases.

Polyphase is the term for a circuit that uses more than one phase of alternating current. In practice, power systems often run on three-phase power, where three AC waveforms are offset by 120 degrees. This arrangement provides smoother voltage, reduced vibrations in motors, and more efficient, balanced power delivery for traction and other equipment. The other terms don’t describe multiple phases: polarity is about which end is positive, phase difference is the angle offset between phases, and power is the rate of energy transfer, not the number of AC phases.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy