Electromagnetic Induction with Short Circuit · CAP 2001 #12
Physics · electromagnetism
Problem
A very long solenoid perpendicular to the page generates a downward magnetic field whose magnitude increases with time. This induces an emf in a conducting wire loop around the solenoid which lights two identical bulbs connected in series along the wire. Now two points diametrically opposed on the wire loop are shorted with another wire lying to the right of bulb B in the plane of the page. After the shorting wire is inserted,
[Figure: Wire loop with two bulbs A and B, and a shorting wire]
(a) bulb A goes out, and bulb B dims.
(b) bulb A goes out, and bulb B gets brighter.
(c) bulb B goes out, and bulb A dims.
(d) bulb B goes out, and bulb A gets brighter.