Why assume uniform conductivity in current models

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Why do they say uniform conductor?
Textbook figure 26.2: a cylindrical conductor of cross-sectional area A, with a segment of length Δx marked and positive charge carriers drifting right at velocity v_d, with Δx = v_d Δt marked below.

Many thanks!
 
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  • Diagram of a cylindrical conductor of cross-sectional area A with a segment of length Δx, showing charge carriers moving at drift velocity v_d over a time Δt, with a second diagram of random carrier motion.
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Because a non-uniform conductor would significantly complicate things.
 
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Orodruin said:
Because a non-uniform conductor would significantly complicate things.
Thanks for your reply @Orodruin !

What's a non-uniform conductor? The textbook does not seem to define these 'uniform' or 'non-uniform' conductors.

Am I correct to say that a uniform conductor is cylindrical, while a non-uniform conductor can have any geometry as long as it is open at both ends.

Many thanks,
Callum
 
Orodruin said:
Because a non-uniform conductor would significantly complicate things.
Thanks for your reply @Orodruin ! How would a non-uniform conductor significantly complicate thing?

Many thanks!
 
Callumnc1 said:
What's a non-uniform conductor?
One in which the conductance varies from place to place within it.
 
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