Question
Explain how does an electric iron work?

Answer

An electric iron works as follows:
When the iron is connected to the electric supply, electric current flows through the heating element (resistor) inside the iron.
The heating element has high resistance, so it produces heat according to Joule’s law $\left(H=I^2 R t\right)$
The heat produced is transferred to the soleplate of the iron, which presses and smooths the clothes.

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