# Feynman's apparent paradox - Electromagnetism

Shan Ravi

This is the paradox discussed in chapter 17 of "Feynman Lectures on Physics - Vol II"

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Say suppose the battery drains out or somehow you stop the current outta the battery. By electromagnetic laws, the disc ought to rotate... but then that violates the law of conservation of angular momentum (since no external torque is being applied)

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