Fuse wire have low or high resistance

Asked by maham237 @ 11/02/2021 in Physics viewed by 326 People

Fuse wire is a wire of
a) high resistivity and high melting point
b) low resistivity and low melting point
c) high resistivity and low melting point
d) low resistivity and high melting point
It has to be C right? correct me with an explanation if I am wrong.

Answered by maham237 @ 11/02/2021

Answer:

B) Low resistivity and low melting point.

Explanation:

A fuse is an electric device consisting of an encapsulated lead or tin wire (low resistivity and low melting point) and placed at a point in the electrical circuit to interrupt the current when it is excessive.

When a short circuit occurs ( exists potential difference between the terminals and low impedance), current intensity tends to infinity which jeopardize the connected devices due to the heat generated by the current intensity due to the Joule effect.

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Fuse wire have low or high resistance

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