Electromagnetic Induction and Alternating Current 7 Question 14
####14. Statement I A vertical iron rod has a coil of wire wound over it at the bottom end. An alternating current flows in the coil. There is a conducting ring round the rod as shown in the figure. The ring can float at a certain height above (2000)
Statement II In the above situation, a current is induced in the ring which interacts with the horizontal component of the magnetic field to produce an average force in the upward direction.
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Answer:
Correct Answer: 14. (a)
Solution:
- The induced current in the ring will interact with horizontal component of magnetic field and both will repel each other. This repulsion will balance the weight of ring.
Hence, option (a) is correct.
