When a toaster operates, into what forms of energy does it primarily convert $\mathrm{electrical} \mathrm{energy}$?

• A. Mainly into $\mathrm{kinetic} \mathrm{energy}$ and $\mathrm{sound} \mathrm{energy}$.
• B. Mainly into $\mathrm{thermal} \mathrm{energy}$ and a small amount into $\mathrm{light} \mathrm{energy}$.
• C. Mainly into $\mathrm{chemical} \mathrm{energy}$ and $\mathrm{nuclear} \mathrm{energy}$.
• D. Mainly into $\mathrm{gravitational} \mathrm{potential} \mathrm{energy}$ and $\mathrm{elastic} \mathrm{potential} \mathrm{energy}$.

Answer: (B)

Verified step by step guidance

1. Identify the initial form of energy involved in the toaster's operation, which is electrical energy supplied through the power source.
2. Understand that the toaster converts electrical energy primarily into thermal energy to heat the bread, which is the main purpose of the device.
3. Recognize that a small amount of electrical energy is also converted into light energy, as the heating elements often glow when hot.
4. Note that kinetic energy and sound energy are not the primary forms of energy produced by a toaster, as it does not involve significant motion or sound generation.
5. Conclude that the main energy conversion in a toaster is from electrical energy to thermal energy, with a minor conversion to light energy.