Question detail
What is the result of heating water in an electric kettle in terms of energy stores?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Energy changes in a system, and the ways energy is stored before and after such changes
Question
- A. The kinetic energy of the water decreases.
- B. The thermal energy of the water increases.
- C. The gravitational potential energy of the water increases.
- D. The elastic potential energy of the water increases.
Answer
The thermal energy of the water increases.
Explanation
The correct option is "The thermal energy of the water increases.". The thermal energy of the water increases. is right because it directly matches Energy stores and systems: Describe energy-store changes when water is heated to boiling in an electric kettle.. The other options are less suitable because they change the required Physics relationship, confuse the relevant energy store or use a distractor that does not answer the question.
Common mistake
Misunderstanding Energy Transfer
Students often think that the energy from the kettle is only stored as thermal energy in the water and forget that energy is also transferred to the kettle itself.
Remember that energy is transferred to both the water and the kettle, and describe how the energy-store changes in both components.
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