(Solution) - A solid copper disk of radius R rotates at angular -(2025 Original AI-Free Solution)

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Academic Level: Undergrad. (yrs 3-4)

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A solid copper disk of radius R rotates at angular velocity w in a perpendicular magnetic field B. The figure shows the disk rotating clockwise and the magnetic field into the page.
(a) Is the charge that accumulates on the edge of the disk positive or negative? Explain.
(b) What is the potential difference between the center of the disk and the edge?