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A very long solenoid with its axis perpe...

A very long solenoid with its axis perpendicular to the page generates an inward magnetic field whose magnitude increases with time. This induces an emf in a conducting wire loop around the solenoid which lights two identical bulbs `A` and `B` connected in series along the wire. Now two points dimetrically opposite on the wire loop are shorted with another conducting wire (having zero resistance) lying to the right og bulb `B` in the plane of the page. After the shorting wire is inserted:

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