Question detail
A heater transfers 3000 J of energy in 60 seconds. Calculate the power of the heater.
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. 30 W
- B. 50 W
- C. 60 W
- D. 80 W
Answer
50 W
Explanation
The correct option is "50 W". 50 W is right because it directly matches Energy stores and systems: Calculate changes in energy when a system is changed by work done by forces.. 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
Common Mistake in Energy Calculation
Students often confuse the work done by forces with the energy stored in a system, leading to incorrect calculations.
Ensure to clearly differentiate between work done and energy changes in a system. Remember that work done by forces results in energy transfer, which can change the energy stores in the system.
Related flashcards
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