A non-conducting circular dies of inner radius a and outer radius b, Q charge is distributed...

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A non-conducting circular dies of inner radius a and outer radius b, Q charge is distributed on the disc. The disc is rotating about it axis with angular velocity. The magnetic field at centre of the disc is MowQ (b-a) ( 0p + zq) 1 n T(b+a) O 2 O r (b^ a n A non-conducting circular dies of inner radius a and outer radius b, Q charge is distributed on the disc. The disc is rotating about it axis with angular velocity. The magnetic field at centre of the disc is MowQ (b-a) ( 0p + zq) 1 n T(b+a) O 2 O r (b^ a n