The unit ‘watt’ is relatively small for practical usage, so a larger unit called ‘kilowatt’ is commonly employed. One kilowatt is equivalent to 1000 watts, making it more convenient to express power values in practical scenarios.

For an electric iron consuming 1 kW of electric power at 220 V, the current flowing in the circuit is (1000/220) A, which is approximately 4.54 A. In this case, a 5 A fuse must be used to ensure that ...

Fuses are rated with specific values to indicate the maximum current they can safely handle. These ratings (1 A, 2 A, 3 A, etc.) help in selecting an appropriate fuse for a specific circuit or device, ensuring protection without unnecessary ...

If a current larger than the specified value flows through the circuit, the temperature of the fuse wire increases. This rise in temperature causes the fuse wire to melt, breaking the circuit and preventing the flow of excessive current.

A fuse typically consists of a piece of wire made of a metal or an alloy with an appropriate melting point, such as aluminium, copper, iron, or lead. The fuse wire is often encased in a cartridge made of porcelain ...