As Shown in the Figure, Two Solenoids Are in Line $S$

question 232

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) \(Y\) is positive and \(X\) is negative.
• B) \(X\) is positive and \(Y\) is negative.
• C) \(X\) and \(Y\) are at the same potential.