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An electric fuse is a thin conductor designed to break a circuit by melting or separating if a fault causes the flow of excessive current. A fuse is a weak point intentionally placed in the circuit, so the fuse is sacrificed if something goes wrong.
A fuse panel in a car is usually near the batteries to protect the rest of the wires in the vehicle.
If a high current occurs from a short circuit or an overloaded circuit, the wire inside the electric fuse melts. This breaks the circuit, and the current stops flowing. An electric fuse essentially gives up its life to stop the flow of electricity.
These fuses have protected a circuit and are considered burned or blown. Some fuses have a clear plastic window that allows you to see if they are still good.

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