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Question

Which is the component that breaks the electric circuit in case of excess current?


  1. Fuse wire

  2. Voltmeter

  3. Earth wire

  4. Ammeter


Solution

The correct option is A

Fuse wire


A fuse is a short length of wire designed to break the circuit in case of excessive current. Temperature increases with current, and after a point the fuse melts thereby breaking the circuit. Fuse wire is made up of a material which has low melting point, thereby saving electrical applicances from damage.

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