Physics
The north pole of a magnet is brought near a metallic ring as shown in the figure given below. The direction of induced current will be :
- anticlockwise
- clockwise
- first anticlockwise and then clockwise
- first clockwise and then anticlockwise
Electro-Magnetism
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Answer
anticlockwise
Reason — As the north pole of the magnet is brought closer to the metallic ring, the magnetic flux through the ring increases.
According to Lenz’s law, the induced current flows in such a direction as to oppose this increase in flux so to oppose the approaching north pole, the face of the ring towards the magnet must behave like a north pole.
For a circular loop, this happens when the current flows anticlockwise (as seen from the magnet side).
Hence, the direction of induced current will be anticlockwise.
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