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.

The generation of heat in a conductor is undesirable because it represents a conversion of useful electrical energy into heat. In electric circuits, this unavoidable heating can increase the temperature of components, potentially altering their properties.

According to Joule’s law, the heat produced in a resistor is directly proportional to the square of the current. This implies that if the current through a resistor is doubled, the heat produced will increase fourfold.

Joule’s law of heating states that the heat produced in a resistor is directly proportional to three factors: (i) the square of the current for a given resistance, (ii) the resistance for a given current, and (iii) the time for ...