What are coils in a toaster?

Coils in a toaster are the heating elements that generate heat to toast bread. Typically made of a nickel-chromium alloy, these coils convert electrical energy into thermal energy when electricity flows through them. As the coils heat up, they radiate heat, which browns and crisps the bread placed inside the toaster. The design allows for even toasting by distributing heat uniformly across the surface of the bread.