Question detail
What is the unit of power in the International System of Units (SI)?
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. Joule
- B. Watt
- C. Newton
- D. Kilowatt
Answer
Watt
Explanation
The unit of power is the watt, which is defined as one joule per second.
Common mistake
Misunderstanding Power
Students often think that power is the total amount of energy transferred, rather than the rate at which energy is transferred.
Emphasize that power is defined as the rate of energy transfer, and clarify that two devices can transfer the same energy but have different power ratings based on how quickly they do so.
Related flashcards
Flashcard 1 of 5
Press Space to flip, arrows to move
Related practice questions
Question 1 of 5
Choose an answer, get feedback, then move sideways through the set.
0 of 4 attempted