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10. A hollow cylindrical conductor (inner radius - current i uniformly spread over its b) carries a cross section. Which graph below correctly a, outer radius gives B as a function of the distance r from the center of the cylinder? 11. A long straight cylindrical shell has an inner radius a and an outer radius b It carries a current i, uniformly distributed over its cross section. A wire is parallel to the cylinder axis, in the hollow region (r s a). The magnetic field is zero everywhere outside the shell (r/> b). We conclude that the wire: a) is on the cylinder axis and carries curre the shell nt i in the same direction as the current in b) may be anywhere in the hollow region but must be carrying current i in the direction opposite to that of the current in the shell c) may be anywhere in the hollow region but must be carrying current i in the same d) is on the cylinder axis and carries current i in the direction opposite to that of the e) does not carry any current direction as the current in the shell current in the shell 12.A long straight cylindrical shell has an inner radius a and an outer radius b. It carries a current i, uniformly distributed over its cross section. A wire is parallel to the cylinder axis, in the hollow region (r < a). The magnetic field is zero everywhere in the hollow region. We conclude that the wire: a) is on the cylinder axis and carries current i in the same direction as the current in the shell b) may be anywhere in the hollow region but must be carrying current i in the direction opposite to that of the current in the shell c) may be anywhere in the hollow region but must be carrying current i in the same direction as the current in the shell d) is on the cylinder axis and carries current i in the direction opposite to that of the current in the shell e) does not carry any current

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