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The current density across a cylindrical...

The current density across a cylindrical conductor of radius `R` varies in magnitude according to the equation `J = J_0(1 - (r )/(R ))` where `r` is the distance from the central axis. Thus, the current density is a maximum `J_0` at that axis `(r = 0)` and decreases linearly to zero at the surface `(r = R)`. Calculate the current in terms of `J_0` and the conductor's cross - sectional area `A = piR^2`.

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RESONANCE ENGLISH-CURRENT ELECTRICITY-Exercise-2 (Part-2)
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