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Free electrons flow along a copper wire X of radius with an average drift speed of . The current in the wire is . There is a current of in a copper wire Y of radius . What is the average drift speed of the free electrons in copper wire Y?
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with an average drift speed of 
. The current in the wire is 
. There is a current of 
in a copper wire Y of radius 
. What is the average drift speed of the free electrons in copper wire Y?
