The current density in a cylindrical conductor of radius R varies according to the equation J = J 0 
, where r = distance from the axis. Thus the current density is a maximum J 0 at the axis r = 0 and decreases linearly to zero at the surface r = 
. Current in terms of J 0 is given by 
then value of n will be.
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
(8)
Sol.
J = J 0 
shaded area dA = 2 π rdr
di = 2 π J 0 
i = 2 π J 0 
= 2 π J 0 
= 
Put A = 4
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