Questions
What is immaterial for an electric fuse wire ?
a
its specific resistance
b
its radius
c
its length
d
current flowing through it
detailed solution
Correct option is C
A fuse wire is required to blow off at a given current strength say iHeat Produced =i2Rt=i2ρlAtNow, msθ=i2ρlAtθ=i2ρltAms=i2ρltA(lAd)sor θ=i2ρtA2dsSo, rise in temperature is independent of length.Talk to our academic expert!
Similar Questions
Permissible current through a fuse wire of diameter 1 mm is 1A. What should be the radius of a fuse wire, made of same material, whose permissible current is 8A ?
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