A disk of radius a carries uniform surface charge density and rotates with angular speed
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A disk of radius a carries uniform surface charge density σ and rotates with angular speed ω about the disk axis. Show that the magnetic field at the disk’s center is 1/2μ0σωα.
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Let us consider an elementary ring of radius r and thickness dr Area of the ring dA 2rdr 2rdr Charge ...View the full answer
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