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19.8: Thinking about the material
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Reflect and research
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Describe how superconductivity arises in certain materials (hint: research “Cooper pairs”).
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What are some example of superconducting materials, and at what temperature do they become superconducting?
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Is there a limit to how much current a conductor can carry?
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Does an AC current have a drift velocity? Why or why not?
To try at home
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Use Ohm’s law and the electrical information on an appliance to determine the current produced drawn by your appliance (e.g. a hair dryer).
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What is the current produced by your phone’s battery? What is the total power stored in your phone’s battery? Check the technical information of your phone.
To try in the lab
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Propose an experiment to create an AC circuit and measure its current.
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Propose an experiment to measure the temperature coefficient (
\(\alpha\)
) and resistivity of a wire.