Q- An infinite cylindrical conductor of radius a = 1 cm carries a current I1 = 0.3 A out of the page. A coaxial, infinite, thin cylindrical conducting shell of radius b = 5 cm carries a current I2 = 0.12 A, into the page. The current densities in each conductor are uniform.
(a) Calculate the magnitude of the current density in the inner conductor.
(b) Calculate the magnitude of the net magnetic field at r = 0.5 cm.
(c) Calculate the magnitude of the net magnetic field at r = 3 cm.
(d) Calculate the magnitude of the net magnetic field at r = 10 cm.
(e) With I1 fixed at 0.3 A, what value of I2 should be chosen to make the net magnetic field in the region r > b equal to zero everywhere?
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