Question detail
A circuit does 1200 J of work in 60 seconds. What is the power of the circuit?
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. 20 W
- B. 30 W
- C. 40 W
- D. 50 W
Answer
20 W
Explanation
The correct option is "20 W". 20 W is right because it directly matches Energy stores and systems: Calculate changes in energy when a system is changed by work done as current flows.. 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 current flowing with the energy transferred, leading to incorrect calculations.
Ensure to use the correct formula for calculating energy changes, specifically relating work done to the energy transferred in the system.
Related flashcards
Flashcard 1 of 5
Related practice questions
Question 1 of 5
Choose an answer, get feedback, then move sideways through the set.