An electrician is inspecting the safety features of a kitchen circuit that supplies a…
PHYSICS · Multi-part · CBSE · Physics · Magnetic Effects of Electric Current · Magnetic Effects of Electric Current
Problem
An electrician is inspecting the safety features of a kitchen circuit that supplies a refrigerator with a metallic body.
(i) Explain why earthing is essential for an appliance having a metallic casing.
(ii) Describe the working principle of a fuse and how it safeguards the wiring when an excessive current flows.
(iii) State any two characteristics that a good fuse wire must possess.
(iv) Give one reason why the fuse is always connected in the live wire and never in the neutral wire.