Question

What is an electric fuse? Why it is used in electric circuits?Should it be
placed on neutral, wire or on live wire? Justify your answer.
(ii) Electrical resistivity of some substances at 20°C are as given below:
Silver 1. 60 ×10-8 Ω -m
Copper 1.62 ×10-8 Ω -m
Tungsten 5.2 × 10-8 Ω -m
Iron 10.0 ×10-8 Ω -m
Mercury 94.0 ×10-8 Ω -m
Nichrome 100 ×10-8 Ω -m
Answer the following questions using following data.
(a) Among silver and copper, which one is a better conductor and why?
(b) Which material would you advise to be used in electrical heating
devices and why?
(iii) What is the direction of conventional current? Give justification for
your answer.


Pls answer I'll mark as brainly. spammers will reported !

Answer 1

An electrical fuse is a simple device used to interrupt an electrical circuit during over current condition due to short circuit and/or overload. An electrical fuse operates on the principle of heating effect of electric current. The fuse is connected to the live wire and not the neutral wire. This is because the electricity is carried by the live wire and if in case there is a situation where high current âow through the live wire to the appliance and the ground wire completes the circuit, then the fuse will protect the appliance by breaking itself. Now, if the fuse was connected to the neutral (the wire which doesnt carry electricity) the appliance would have burned due to the situation considered.

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