A student is describing how the following circuit works - Scottish Highers Physics - Question 11 - 2016
Question 11
A student is describing how the following circuit works.
The student states:
"The electricity comes out of the battery with energy and flows through the resistor u... show full transcript
Worked Solution & Example Answer:A student is describing how the following circuit works - Scottish Highers Physics - Question 11 - 2016
Step 1
Comment on Energy Flow
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Answer
The statement indicates that electricity flows from the battery, and this is accurate as the battery provides the necessary voltage for the circuit. However, the student should clarify how this flow involves energy transfer, where energy is indeed transformed as it moves through components.
Step 2
Analysis of the Resistor
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Answer
The resistor in the circuit uses some energy, primarily as thermal energy due to resistance, converting electrical energy to heat. This should be mentioned, as it aligns with the principle of energy conservation.
Step 3
LED Energy Transformation
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Answer
The remark about the LED converting energy to light waves is correct. In an LED, when current flows through it, electrons recombine with holes, releasing energy in the form of photons—this shows an essential understanding of how devices operate using electric energy.
Step 4
Overall Understanding
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Answer
Overall, the student demonstrates a reasonable understanding of the circuit's operation. They recognize the roles of the battery, resistor, and LED, although a more detailed explanation of energy transformations at each component would enhance their answer.
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