A Wire Lying in the Plane of This Page Carries

question 79

Multiple Choice

A wire lying in the plane of this page carries a current directly toward the top of the page.What is the direction of the magnetic force this current produces on an electron that is moving perpendicular to the page and outward from it on the left side of the wire?

• A)perpendicular to the page and towards you
• B)perpendicular to the page and away from you
• C)toward the top of the page
• D)toward the bottom of the page
• E)The force is zero.

---

Definitions:

Unit Contribution Margin

The difference between the selling price per unit and the variable cost per unit.

Break-even Point

The level of production or sales volume at which total revenues equal total costs, resulting in no net profit or loss.

Variable Expense

Costs that vary in relation to a company's operations.

Contribution Margin Ratio

A financial performance metric that measures the additional profit generated for each dollar of sales after variable costs are subtracted.