Created by StemPy LabWhy must an induced current have the direction that opposes the change of flux that causes it?
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← A copper ring lies flat on a table. A magnet is let fall towards it, north pole first, along the axis of the ring. While the magnet comes down, which way does the induced current turn in the ring, as seen from above?A metal bar 0.72 m long slides at 3.9 m/s across a uniform field of 0.047 T. The bar, its velocity and the field are at right angles to one another. What is the emf between the ends of the bar? →
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