Lenz's Law, Eddy Currents & Induced Electric Field
A copper ring having a cut such as not to form a complete loop is held horizontally and a bar magnet is dropped through the ring with its length along the axis of the ring as shown in figure. The acceleration of the falling magnet is ( acceleration due to gravity)
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Answer: (a)
- The ring has a cut, so it is not a closed loop.
- An emf is induced but no current can flow, so there is no opposing magnetic force on the magnet.
- The magnet falls freely, acceleration . Answer (a).