a) Of what substance is a fuse wire made? Why?
b) Explain why, a copper wire cannot be used as a fuse wire.
Answers
Answered by
24
a) alloy of tin and iron because it has low melting point
b) because copper wire has high melting point than other metal
b) because copper wire has high melting point than other metal
Answered by
30
HELLO THERE!
A fuse is a safety device which limits the current in a power circuit and hence saves the appliances from damage when there is voltage fluctuation or heavy current flows through the circuit.
A fuse wire works on the heating effect of the current. When a current higher than the fuse rating passes through the wire, the wire gets heated up to that extent that its melts, thus breaking the circuit. Hence, a fuse wire should have low melting point.
(a) Thus, a fuse wire is made up of Solder, an alloy of lead and tin, whose melting point is less than both lead and tin.
(b) A copper wire has high melting point. So, when heavy current passes through it, it does not easily melt. Moreover, copper is a good conductor of electricity, so its resistivity is low, due to which, heat formed in it will be much less. So, it won't melt easily.
Thus, copper wire is not preferred.
HOPE MY ANSWER IS SATISFACTORY!
A fuse is a safety device which limits the current in a power circuit and hence saves the appliances from damage when there is voltage fluctuation or heavy current flows through the circuit.
A fuse wire works on the heating effect of the current. When a current higher than the fuse rating passes through the wire, the wire gets heated up to that extent that its melts, thus breaking the circuit. Hence, a fuse wire should have low melting point.
(a) Thus, a fuse wire is made up of Solder, an alloy of lead and tin, whose melting point is less than both lead and tin.
(b) A copper wire has high melting point. So, when heavy current passes through it, it does not easily melt. Moreover, copper is a good conductor of electricity, so its resistivity is low, due to which, heat formed in it will be much less. So, it won't melt easily.
Thus, copper wire is not preferred.
HOPE MY ANSWER IS SATISFACTORY!
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