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A current passes through a wire of nonun...

A current passes through a wire of nonuniform cross-section. Which of the following quantites are independent of the cross section?

A

free electron density

B

current density

C

drift speed

D

the charge crossing in a given time internal

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The correct Answer is:
a,d
When current passes through a wire of none-uniform cross-section, there of the wire. It means, the charge crossing is a given time interval over every cross-section of wire. The no of free electrons per unit volume i.e. free electron densidy is also independent of the cross-section of the wire
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