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Suppose a current-carrying wire has a cross-sectional area that gradually becomes smaller along the wire, so that the wire has the shape of a very
Suppose a current-carrying wire has a cross-sectional area that gradually becomes smaller along the wire, so that the wire has the shape of a very long, truncated cone. How does the drift speed vary along the wire?
It doesn't change.
It speeds up as the cross section becomes smaller.
More information is needed
.It slows down as the cross section becomes smaller.
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