The density of mobile electrons in copper metal is 8.4 x 1028 m, Suppose that / 9.0 x 101 electrons/s are drifting through a copper wire. (This is a typical value for a simple circuit.) The diameter of the wire is 1.3 mm. In this case, about how many minutes would it take for a single electron in the electron sea to drift from one end to the other end of a wire 26 cm long? minutes

Physics for Scientists and Engineers: Foundations and Connections
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ISBN:9781133939146
Author:Katz, Debora M.
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Chapter28: Current And Resistance
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The density of mobile electrons in copper metal is 8.4 x 1028 m-3. Suppose that i = 9.0 × 1018 electrons/s are drifting through a copper wire. (This is a typical value for a simple circuit.) The diameter of the wire is 1.3 mm. In this case, about how many minutes would it take for a single electron in the
electron sea to drift from one end to the other end of a wire 26 cm long?
minutes
(A puzzle: if the drift speed is so slow, how can a lamp light up as soon as you turn it on? We'll come back to this in the next chapter.)
Transcribed Image Text:The density of mobile electrons in copper metal is 8.4 x 1028 m-3. Suppose that i = 9.0 × 1018 electrons/s are drifting through a copper wire. (This is a typical value for a simple circuit.) The diameter of the wire is 1.3 mm. In this case, about how many minutes would it take for a single electron in the electron sea to drift from one end to the other end of a wire 26 cm long? minutes (A puzzle: if the drift speed is so slow, how can a lamp light up as soon as you turn it on? We'll come back to this in the next chapter.)
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