Which device converts electrical energy into light and thermal energy?

Which device converts electrical energy into light and thermal energy?

• A. Light bulb
• B. Solar panel
• C. Battery
• D. Radio

Answer: (A)

Electric energy can be transformed into light and heat when it encounters resistance inside a device like a light bulb. The electric current heats the filament, releasing energy as visible light and, as a byproduct, thermal energy. That combination of light and warmth is exactly what the device does, so it is the best example of converting electrical energy into light and thermal energy. Other devices perform different transformations: a solar panel turns light into electricity, a battery stores and supplies electrical energy, and a radio converts electrical energy into sound.

Electric energy can be transformed into light and heat when it encounters resistance inside a device like a light bulb. The electric current heats the filament, releasing energy as visible light and, as a byproduct, thermal energy. That combination of light and warmth is exactly what the device does, so it is the best example of converting electrical energy into light and thermal energy. Other devices perform different transformations: a solar panel turns light into electricity, a battery stores and supplies electrical energy, and a radio converts electrical energy into sound.