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Q4. A straight long solid cylindrical conductor of radius a carries current I along its length. The current density varies as J=Jor within the conductor,

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Q4. A straight long solid cylindrical conductor of radius a carries current I along its length. The current density varies as J=Jor within the conductor, where r is the radial distance from the axis of symmetry of the conductor. (a) Find the constant Jo in terms of quantities given (b) Find the magnetic eld strength for r a

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