As Shown in the Figure, Two Solenoids Are in Line

question 26

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.

---

Definitions:

Average Variable Cost

Average Variable Cost is calculated by dividing the total variable cost (cost that changes with the amount of output) by the quantity of output produced.

Marginal Cost

An incremental expense associated with manufacturing one extra item of a product.

Average Fixed Cost

The total fixed costs divided by the number of units produced, representing how fixed costs dilute with increased production.

Marginal Cost

Marginal cost is the increase or decrease in the total cost that arises when the quantity produced is incremented by one unit.