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for david: two coppe wires of different diameter are joined

Resolved Question:

for david: two coppe wires of different diameter are joined end to end and a current flows. when electrons move from the larger-diameter wire to the smaller diameter wire, what happens to drift speed. I said increase (more resistance) but the answer is decrease -- is this correct? If so, is it because drift speed is a function of electrons "banging" into atoms in the wire and the more "bangs" the greater the drift speed?
Submitted: 5 years ago.
Category: Homework
Expert:  David replied 5 years ago.

David :

Well you gave correct reason but wrong conclusion. Indeed the we have more resistance, so it means it is becoming more difficult for the electron to move through the wire, so the drift should definitely decrease.

David :

Does it make sense, now?


got it, thx

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