Question

a light bulb transforms electrical energy into which of the following?
heat only
light and motion
light only
light and heat

Explanation:

When a light bulb is in operation, electrical energy is used. Some of it is converted into light (which is the useful output for illumination). However, due to the resistance in the filament and other components, a significant portion is also converted into heat. There is no motion involved in a typical light - bulb operation.

Answer:

light and heat