Physics
Grade-7
Easy
Question
A device that breaks the electric circuit in the case of excess current is called
- Switch
- Earth wire
- Fuse wire
- Voltmeter
Hint:
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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