Question

Explain the importance of using in a household electric circuit.
$\left( 1 \right)$ Fuse, and
$\left( 2 \right)$ Earthing wire

Answer 1

Hint: A fuse is needed in any AC or DC electronic circuit. To reduce the risk of overheating a cable or device a fuse is used. In order to avoid electric shocks earthing wires are used. These wires keep the appliance and the earth at the same potential. Using the above statement explain the importance of fuse and earthing wire in a household circuit

Complete answer:
Fuse is a piece of wire that is composed of pure tin or alloy of tin and copper. They have low melting point and high resistance. When the high current flows through the circuit the fuse wire will melt and the circuit is broken and the appliances will be saved from damage. A fuse is needed in any AC or DC electronic circuit.
When an overload takes place, the heat is produced in the wiring and the components. When it happens, a fuse reacts almost instantly and stops the flow of electricity in the circuit. Hence it stops the heat production. Without the fuse, the appliances will be damaged and even fire could result. A maximum amount of current is allowed to pass through each fuse without breaking and it is usually written as a number on the fuse.
In order to avoid electric shocks earthing wires are used. Earthing wire is connected to the metal body of the appliances. Earthing wire is attached with a copper plate buried deep down in the ground. This helps to maintain the appliances and the earth at same potential so that it prevents electric shock.

Note: Earthing helps to keep people safe from electric shocks. It also prevents damage to the appliances. They recommend fitting cable into the circuit for double protection. A fuse is needed in any AC or DC electronic circuit. Earthing wire is connected to the metal body of the appliances. Fuses have a low melting point. Fuses will protect devices from damage.