Figure shows a powerful electromagnet arrangement. A copper ring, which is free to move, is placed on the projecting part of the core as shown. When the key is inserted, the ring A. is thrown upB. remains stationaryC. sticks to the coreD. slips down along the core

Figure shows a powerful electromagnet arrangement. A copper ring, whic

1.	Figure shows a powerful electromagnet arrangement. A copper ring, which is free to move, is placed on the projecting part of the core as shown. When the key is inserted, the ring A. is thrown upB. remains stationaryC. sticks to the coreD. slips down along the core
Answer» Correct Answer - A Flux through teh ring increases in upward direction. To oppose the same, it is thrown up. As the ring moves up, intensity of magnetic field due to electromagnet at upper points is less since `B alpha((1)/(r^(3)))`.

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Figure shows a powerful electromagnet arrangement. A copper ring, which is free to move, is placed on the projecting part of the core as shown. When the key is inserted, the ring A. is thrown upB. remains stationaryC. sticks to the coreD. slips down along the core

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