How many revolutions did the disc make during this time

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Q. A spinning disc rotating at 134 rev/min slows and stops 27 seconds later. How many revolutions did the disc make during this time?

Q. A circular loop in the plane of the paper lies in a 0.55T magnetic field pointing into the paper. If the loop's diameter changes from 20.0cm to 5.0cm what is the magnitude of the average induced emf?

Reference no: EM1351492

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