Multiple Choice
As shown in the figure,two solenoids are in line.The switch S,initially closed,is suddenly opened.Just after opening S,what is the polarity of the induced emf in terminals X and Y? 
A) X and Y are at the same potential.
B) X is positive and Y is negative.
C) Y is positive and X is negative.
Correct Answer:
Verified
Correct Answer:
Verified
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