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Question: 1 / 400

What function does a relay serve in an electrical system?

To act as a mechanical fuse

To convert AC to DC

To act as an electrically operated switch for higher power circuits

A relay serves as an electrically operated switch that is capable of controlling higher power circuits using a lower power signal. When a relay is energized, its internal mechanism closes or opens a set of contacts, allowing or interrupting the current flow in a separate high-power circuit. This function is particularly useful for controlling devices that require more power than a simple switch can handle, making relays essential in various applications, including automation, protection, and remote control of electrical devices.

Relays are often used to manage large loads in industrial settings or in machinery where safety and reliability are paramount. By using a low-voltage signal to actuate a relay, it can operate high-voltage or high-current circuits without exposing the control circuit to those conditions, thus ensuring the safety of the control components and operators.

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To measure current flow

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