Q.

A wire has a non-uniform cross-section as shown in the figure. A steady current is flowing through it. Then the drift speed of the electrons

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a

is constant throughout the wire

b

decreases from A to B

c

increases from A to B

d

varies randomly

answer is B.

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A wire has a non-uniform cross-section as shown in the figure. A steady current is flowing through it. Then the drift speed of the electrons