A Single Current-Carrying Circular Loop of Radius R Is Placed

question 89

Multiple Choice

A single current-carrying circular loop of radius R is placed next to a long, straight wire, as shown in the figure. The current I in the wire flows to the right. In which direction must current flow in the loop to produce a net magnetic field of zero at its center?

• A) counterclockwise
• B) clockwise
• C) It could be either clockwise or counterclockwise.
• D) The current in the loop should be zero.

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Definitions:

Relevant Range

The range of activity within which the assumptions about fixed and variable costs in cost-volume-profit analysis are valid.

Fixed Costs

Expenses that do not change with the level of production or sales, such as rent, salaries, and insurance.

Contribution Margin

The difference between sales revenue and variable costs, representing the amount that contributes towards covering fixed costs and generating profit.

Weighted Average

A calculation that takes into account the varying degrees of importance of the numbers in a data set, used in financial analysis and grading.