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Question

What happens when alternating current passes through a conductor?

A.

It remains uniformly distributed throughout the section of conductor

B.

Portion of conductor near the surface carries more current as compared to the 

C.

Portion of conductor near the surface carries less current as compared to the core

D.

Entire current passes through the core of the conductor

Answer ( Option B)

Portion of conductor near the surface carries more current as compared to the 

Solution

Due to A.C. current flow on a conductor,resistance of central or inner part of the conductor  is more than outer surface. Thus portion of conductor near the surface carries more current as  compared to core. 

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