The north pole of a magnet is brought down along the axis of a horizontal circular coil.

Question:

The north pole of a magnet is brought down along the axis of a horizontal circular coil. As a result, the flux through the coil changes from $0.35$ weber to $0.85$ weber in an interval of half a second. Find the average emf induced during this period. Is the induced current clockwise or anticlockwise as you look into the coil from the side of the magnet?

Solution:

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