I keep getting the wrong asnwer for this? An infinite solenoid with radius a and n turns per unit length carries a current which increaseslinearly with time, as I(t) = at a > 0. The solenoid is looped by a circular wire of radius r,coaxial with it. The magnetic field due to the current in the solenoid is B = onI inside thesolenoid and B = 0 outside the solenoid. Use the cylindrical coordinates (r, 0, z) and note , 0,and k are the unit vectors, with the z axis pointing upward. Use the integral form of Faraday'slaw, i.e. § Ē.dī = – dº todtxIZ↑0yFigure 6: The cylindrical coordinates (r, 0, z) used in question B1a) Drive an expression for the electric field in the loop for r

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Answered: An infinite solenoid with radius a and…

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