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Which factor is immaterial for the wire used in electric fuse?

a)

Length

b)

Radius

c)

Material

d)

Current


Question ID - 151199 | Toppr Answer

Which factor is immaterial for the wire used in electric fuse?

a)

Length

b)

Radius

c)

Material

d)

Current

1 Answer - 5876 Votes

3537

Answer Key : (a) -

(a)

Electric fuse is a type of over current protection device.  They are engineered to contribute a negligible amount of extra resistance to the circuits they protect.  This is largely accomplished by making the fuse wire as short as possible.  Fuses are primarily rated as current amperes.  A fuse wire of certain material and gauge will blow at a certain current no matter how long it is.  Since, length is not a factor in current rating the shorter it can be made the less resistance it will have end to end.



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