Describe energy transfers in everyday devices
The idea
Name the device’s energy input, such as electrical energy.
Step by step
- Name the device’s energy input, such as electrical energy.
- Use its stated purpose to identify a useful output.
- Other energy transfers, including heating, can happen at the same time.
Example
A battery-powered lamp is used to illuminate a page. Which useful output serves that purpose?
Answer
light
Light from the lamp makes the page visible.
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Choose a battery-powered lamp and fan. Draw arrows for electrical input and their different useful outputs.
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