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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > The current density across a cylindrical conductor of radius R varies in magnitude according to the equation J = J0 ( 1−r/R ) where r is the distance from the central axis. Thus, the current density is a maximum J0 at that axis (r = 0) and decreases linearly to zero at the surface (r = R). Calculate the current in terms of J0 and the conductor ‘s cross – sectional area A = πR2.

The current density across a cylindrical conductor of radius R varies in magnitude according to the equation J = J0 ( 1−r/R ) where r is the distance from the central axis. Thus, the current density is a maximum J0 at that axis (r = 0) and decreases linearly to zero at the surface (r = R). Calculate the current in terms of J0 and the conductor ‘s cross – sectional area A = πR2.

How many electrons per second pass through a section of wire carrying a current of 0.7 A? The current density across a cylindrical conductor of radius R varies in magnitude according to the equation J = J0 ( 1−r/R ) where r is the distance from the central axis. Thus