Questions
Statement 1: Fuse wire must have high resistance and low melting point.
Statement 2: Fuse is used for a maximum limiting current flow only.
detailed solution
Correct option is A
Fuse wire must have high resistance because in series current remains same. Also, according to joule's law, H=i2Rt4.2, therefore heat produced is high if R is high. The melting point must be low so that the wire may melt with increase in temperature. As the current greater than maximum safe value flows through the fuse wire, it heats up, melts and break the circuit.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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