Problem 6 The current in a long solenoid of radius 3 0 cm and 20 turns cm is varied at a rate dl of di 2 A s dt a Derive the

Question

Problem 6 The current in a long solenoid of radius 3 0 cm and 20 turns cm is varied at a rate dl of di 2 A s dt a Derive the expression for the magnitude of the electric field outside of the solenoid in terms of the number of turn per unit length n radius R the distance from the center of the wire r and the rate of change of the current dl dt

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