Discussion
When Alternating Current passes through a conductor:
Answer: B
With alternating current, the Portion of conductor near the surface carries more current as compared to the core.
This is the skin effect. The alternating flux linking the centre of the conductor is greater than that linking the outer layers, so the central filaments have more inductive reactance. Current is pushed towards the surface, where the impedance is lower.
Uniform distribution holds only for direct current. The options putting less current, or all of it, in the core reverse the effect.
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