What is a fuse wire? ?
If too high a current flows, the element rises to a higher temperature and either directly melts, or else melts a soldered joint within the fuse, opening the circuit. The fuse element is made of zinc, copper, silver, aluminum, or alloys to provide stable and predictable characteristics.
For safety, the fuse wire used in the mains for household supply of electricity must be made of metal having _________
Solution -:
The fuse wire is used on the basis on the Joules law of heating.
The law says that when the electric current is allowed to pass trough a conductor, the conductor heats up and is proportional to the square of current.This is because practical conductors have definite resistance(normally it is small).
The heat produced= Isq*R*T
The main object of using fuse wire in electric circuit is to provide protection against short circuit or overload current. This means it protects the circuit from huge amount of current flow as it cause the damage to the circuit.
The fuse wire select such a way that it burns and break the circuit when large current passes. For this purpose the material used as fuse wire should have high resistance and low melting point.Due to high resistance the wire heats up quickly, when huge current flows. The temperature around the fuse wire rapidly rises, when it reaches the melting point of the material it burns and protects the circuits.
High resistance and low melting point are responsible to the quick response of the fuse wire towards the current.
The common material used as fuse wire is an alloy of tin and lead.
If too high a current flows, the element rises to a higher temperature and either directly melts, or else melts a soldered joint within the fuse, opening the circuit. The fuse element is made of zinc, copper, silver, aluminum, or alloys to provide stable and predictable characteristics.
For safety, the fuse wire used in the mains for household supply of electricity must be made of metal having _________
Solution -:
The fuse wire is used on the basis on the Joules law of heating.
The law says that when the electric current is allowed to pass trough a conductor, the conductor heats up and is proportional to the square of current.This is because practical conductors have definite resistance(normally it is small).
The heat produced= Isq*R*T
The main object of using fuse wire in electric circuit is to provide protection against short circuit or overload current. This means it protects the circuit from huge amount of current flow as it cause the damage to the circuit.
The fuse wire select such a way that it burns and break the circuit when large current passes. For this purpose the material used as fuse wire should have high resistance and low melting point.Due to high resistance the wire heats up quickly, when huge current flows. The temperature around the fuse wire rapidly rises, when it reaches the melting point of the material it burns and protects the circuits.
High resistance and low melting point are responsible to the quick response of the fuse wire towards the current.
The common material used as fuse wire is an alloy of tin and lead.
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