Question

distinguish between the material used to make electric fuse wire and that to make filament of bulb

Answer 1

the wire is used in fuse is lead and in bulb it is made up of tungsten.
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Answer 2

HELLO THERE!

Here's your answer:

Distinguish between the material used to make electric fuse wire and that to make filament of bulb.


Note: A fuse is a safety device connected to a power circuit, which works on the heating effect of current. When excess amount of current flows through a wire to an appliance, which can actually damage the appliance. When heavy current flows through the wire due to voltage fluctuation, or overloading, or if the wire gets heated up due to short circuit, then the fuse wire melts (because of its low melting point) and breaks the circuit, thus saving the appliance.

Hence, the characteristics of a fuse wire:

1. It should have a low melting point, so that at a temperature just above the current rating, it melts.

2. It should have high resistivity, so that it gets heated up to a much more extent than a wire of low resistivity.


So, the fuse wire is made up of Solder, an alloy of lead and tin.




Note: Such wires should be used to make filaments of bulb, which has a high resistance and high melting point, so that it gets heated up to such an extent that it glows, as the current flows through it.

It should have a high melting point, so that even if higher temperature is reached, the wire does not melt.


Hence, tungsten (W) wire is used to make the filament of a bulb. The wire is fixed inside the glass case of the bulb in a twisted manner which increases its length, so that its resistance also increases.



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