Physics
Grade-7
Easy

Question

A device that breaks the electric circuit in the case of excess current is called

  1. Switch
  2. Earth wire
  3. Fuse wire
  4. Voltmeter

hintHint:

Fuse wire

The correct answer is: 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 there by breaking the circuit. Fuse wire is made up of a material which has no melting point, thereby saving electrical appliances from damage

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