JEE Advanced · Physics · 20. Magnetism & Current
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. The rod goes through a conducting ring as shown in the figure. The ring can float at a certain height above the coil.
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 the upward direction.
- A Statement I is true, Statement II is true; Statement II is a correct explanation for Statement
- B Statement I is true, Statement II is true; Statement II is NOT a correct explanation for Statement I
- C Statement I is true, Statement II is false
- D Statement I is false, Statement II is true
Answer & Solution
Correct Answer
(A) Statement I is true, Statement II is true; Statement II is a correct explanation for Statement
Step-by-step Solution
Detailed explanation
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.
This repulsion will balance the weight of ring.
Hence, option (a) is correct.
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