A fuse in an electric circuit acts as a :

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Current multiplication

Voltage multiplication

Power multiplier

Safety device

answer is D.

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Detailed Solution

Concept: The circuit diagram's components include everything that is connected to the circuit. The actual electrical connections are displayed in a circuit diagram. In a circuit, common components include wire, resistors, rheostats, cells, capacitors, diodes, etc. A fuse serves as a safety measure in an electrical circuit. Only the desired quantity of current is permitted to pass through it.
An electrical circuit uses fuses as a safety measure to prevent appliances from being damaged by an excessive current flow. The heating effect of electric current is the basis for a fuse's operation. Due to the fuse wire's lower melting point when there is an excessive current flowing through the circuit, it melts and opens the entire electrical circuit. As a result, the electric circuit's connected appliances are shielded from damage brought on by the circuit's high current flow. The fuse serves as a safety measure in an electrical circuit in this way.
Hence, the correct option is 4.

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