Maintenance Technician 2026 Complete Practice Test

The component that helps protect electronic devices from voltage spikes is a fuse. A fuse is designed to interrupt the flow of electricity when it detects an excessive current that could indicate a voltage spike or short circuit. By melting and breaking the circuit, the fuse prevents further current from flowing, thereby protecting sensitive components within electronic devices from damage due to surges in voltage.

While capacitors, resistors, and transformers play significant roles in electronic circuits, they do not primarily serve the purpose of protecting against voltage spikes. Capacitors can store and release electrical energy and may smooth out voltage fluctuations, but they do not actively disconnect or protect components. Resistors limit current flow but do not prevent voltage spikes. Transformers are used to increase or decrease voltage levels but do not offer protection against surges. Thus, a fuse is specifically designed for the protection of electronic devices from potentially harmful voltage spikes.