Question detail
A heater transfers 1800 J of energy in 60 seconds. What is 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. A distractor that confuses Energy stores and systems with a different Energy idea
- C. A distractor that ignores calculate changes in energy when
- D. A distractor that uses the wrong unit or relationship for this question
Answer
30 W
Explanation
The correct option is "30 W". 30 W is right because it answers the Energy stores and systems objective: Calculate changes in energy when a system is changed by work done as current flows.. The distractors are incorrect because they either use the wrong Physics quantity, confuse an energy store with a transfer, or ignore the wording of this 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.
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