A current is flowing through a conductor with non-uniform area of cross-section. Then

current will be different at different cross-sections.
current will be the same at all the cross-sections.
current will be different but current density will be same at all the cross-sections
current will be the same but current density will be different at different cross-sections.

Correct Answer: current will be the same but current density will be different at different cross-sections.

Explanation:

Current density = current/area of cross-section. Same current throughout the conductor.

Since, area of cross-section is non-uniform, current density will be different at different cross-sections.

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