What is meant by resistance heating?

This principle is used in many everyday applications, such as:

- **Electric heaters**: These use elements made of materials with high resistance (like nichrome) to generate heat.

- **Toasters**: The heating coils resist the electrical current, generating heat to toast bread.

- **Electric stoves**: The heating elements resist the electric current, producing heat to cook food.

The amount of heat generated is proportional to the square of the current multiplied by the resistance, according to Joule's law: \( Q = I^2 R t \), where \( Q \) is the heat generated, \( I \) is the current, \( R \) is the resistance, and \( t \) is the time.