In which of the following examples does chemical energy change to electrical energy?

• A. A solar panel generating electricity from sunlight
• B. A person running after eating food
• C. A toaster heating bread
• D. A battery powering a flashlight

Answer: (D)

Verified step by step guidance

1. Understand the types of energy involved in each example: chemical energy, electrical energy, mechanical energy, thermal energy, and radiant energy.
2. Recall that chemical energy is stored in the bonds of molecules and can be converted into other forms of energy through chemical reactions.
3. Analyze each example to identify the energy transformation: for instance, a solar panel converts radiant energy (sunlight) into electrical energy, not chemical energy to electrical energy.
4. Recognize that a battery stores chemical energy and converts it directly into electrical energy when powering a device like a flashlight.
5. Conclude that the example where chemical energy changes to electrical energy is the battery powering a flashlight, because the battery's chemical reactions produce electrical current.