Question

a solenoid of radius r is made of thin metallic wire rings with resistance of each ring R . The rings have been put in a uniform way on a very long glass cylinder which has vacuum inside it . The solenoid and glass cylinder are glued to each other . the number of ringds 0er unit length is n and the planes containing the rings are perpendicular to the symmetry asxis of cylinder .a t a poimt moment the cylinder starts rotating around iys symmetry​

Answer 1

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