Real materials only have so many electrons (with fixed charge) that are free to move through a circuit. How can the same object allow different amounts of current to flow through it? Use what you noticed about the electrons in the simulation to justify your answer. image of simulation below

Physics for Scientists and Engineers: Foundations and Connections
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ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter28: Current And Resistance
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Real materials only have so many electrons (with fixed charge) that are free to move through a circuit. How can the same object allow different amounts of current to flow through it? Use what you noticed about the electrons in the simulation to justify your answer.

image of simulation below

 

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Step 1

Current is defined as the flow of the ratio of charge and time. Therefore the current depends on the charge and as well as time. Real materials have fixed charge and hence it only depends on the time up to which charge passes.

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