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 ...

The primary purpose of a fuse in an electric circuit is to protect circuits and appliances by stopping the flow of any unduly high electric current. It acts as a safety device. If a current larger than the specified value ...

In an electric bulb, most of the power consumed by the filament appears as heat, but a small part is radiated as light. The primary form of energy conversion is from electrical energy to heat, with measures such as using ...

In an electric bulb, the filament must retain as much of the heat generated as possible to get very hot and emit light. Tungsten, a strong metal with a high melting point (3380°C), is commonly used for making bulb filaments. ...

Electric laundry irons, electric toasters, electric ovens, electric kettles, and electric heaters are examples of familiar devices that utilize Joule’s heating for their operation.

The heating effect of electric current is harnessed in devices such as electric laundry irons, toasters, ovens, kettles, and heaters. These devices operate based on Joule’s heating, converting electrical energy into heat for specific applications.