A disc of radius r carrying total positive charge q rotates with angular speed ω in a uniform magnetic field B about the fixed axis shown. The disc axis makes angle θ with B. The torque applied by the axis on the disc is:
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A disc of radius r carrying total positive charge q rotates with angular speed ω in a uniform magnetic field B about the fixed axis shown. The disc axis makes angle θ with B. The torque applied by the axis on the disc is:
Options