What is short circuiting how does a fuse protect the circuit.Why we should earth electical appliances 0?
Answers
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Here is your answer :
I.) A short circuit (sometimes abbreviated to short or s/c) is an electrical circuit that allows a current to travel along an unintended path with no or a very low electrical impedance. This results in an excessive amount of current flowing into the circuit. The electrical opposite of a short circuit is an "open circuit", which is an infinite resistance between two nodes. It is common to misuse "short circuit" to describe any electrical malfunction, regardless of the actual problem.
II.) Fuse separate the electrical circuit from excessive current. Fuse has a wire that is alloy of different materials with low melting point and high conductivity. ... short circuit makes the short path voltage zero and huge amount of current flows through that path. Fuse can protect a system from over current .
III.) The earth wire creates a safe route for the current to flow through if the live wire touches the casing. You would get an electric shock if the live wire inside an appliance, such as a cooker, came loose and touched the metal casing. ... A strong current surges through the earth wire because it has a very low resistance.
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