Answer / kkb2003

for ac supply the surface resistance of a body is more
than inner.Due to skin effect the resistance of a body for
a.c supply is more than d.c supply.generally R (a.C)=1.1
to1.3 times of R (d.c)

Answer / saravanan

In a solid conductor, as the radius increases the
resistance also increases to outer surface.Inner surface
has lower resistance than outer.since ac is fluctuating,
the current concentrates more on low resistance region
(inner).so that there is less current flow in outer
surface.This phenomenon is called skin effect.

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