Wiring and componentsQuestion 398 of 1506

What is the purpose of a relay or contactor?

A small current controls a large current
It stores electric charge for later use
It lowers the supply voltage for the load
It converts AC power into DC power

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Correct answer: A small current controls a large current

A control circuit energizes a coil that closes contacts in the power circuit.

Source: Electrical Fundamentals Competency (Industry Training Authority of BC), 5.5: Circuit Control Devices

Questions last reviewed: 18 October 2026

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