Nate Electrical Practice Exam 2025 - Free Electrical Practice Questions and Study Guide

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What component is typically used to interrupt current in an overloaded circuit?

Fuse

A fuse is specifically designed to protect electrical circuits from overloads by interrupting the flow of current. When too much current passes through a circuit—typically due to a short circuit or an overload—the wire in the fuse heats up and eventually melts, thereby breaking the circuit. This action prevents excessive heat from potentially causing damage to equipment or creating fire hazards.

Transformers, capacitors, and resistors serve different purposes in electrical circuits. A transformer is used to change the voltage levels in an AC circuit, while a capacitor temporarily stores electrical energy. A resistor limits current flow and dissipates energy as heat but does not automatically interrupt current when it exceeds a certain threshold. Therefore, in the context of protecting a circuit from overload, the fuse is the appropriate component to use.

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Transformer

Capacitor

Resistor

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