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Not the whole subject — just the part you're stuck on. Try the interactive lesson below, built for one of the trickiest topics in Class 12 Physics.
6.3 · electromagnetic induction · lenz's law
Think of the coil like a crowd at a doorway. When someone rushes in, the crowd pushes back to resist the change — that push-back is the induced current. Right now the magnet is approaching, so the coil opposes the increasing field, and the needle deflects one way.
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