Question detail
A device transfers 5000 joules of energy in 25 seconds. Calculate the power of the device.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Energy changes in a system, and the ways energy is stored before and after such changes
Question
A device transfers 5000 joules of energy in 25 seconds. Calculate the power of the device.
Answer
200 W
Explanation
This question tests the ability to apply the power formula using energy transferred and time. The calculation shows how to determine the power output of a device. This answer is linked to Power because it applies the learning objective: Calculate power using energy transferred divided by time.. It shows the Physics relationship clearly and keeps energy, power, work done and efficiency terms distinct where they appear.
Common mistake
Common Mistake in Power Calculation
Students often confuse the formula for power, using work done instead of energy transferred.
Remember that power can be calculated using the formula: power = energy transferred / time. Ensure you use energy transferred when calculating power.
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