The Long Straight Wire in the Figure Carries a Current

question 15

Multiple Choice

The long straight wire in the figure carries a current I that is decreasing with time at a constant rate.The circular loops A,B,and C all lie in a plane containing the wire.The induced emf in each of the loops A,B,and C is such that

• A) no emf is induced in any of the loops.
• B) a counterclockwise emf is induced in all the loops.
• C) loop A has a clockwise emf, loop B has no induced emf, and loop C has a counterclockwise emf.
• D) loop A has a counter-clockwise emf, loop B has no induced emf, and loop C has a clockwise emf.
• E) loop A has a counter-clockwise emf, loops B and C have clockwise emfs.

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Definitions:

Total Fixed Costs

The sum of all costs that remain constant regardless of the level of production or sales in a company.

Marginal Cost

The addition to total cost that results from producing one more unit of output.

Diseconomies of Scale

The condition in which a company's costs per unit increase as it produces more units, typically due to inefficiencies that arise with increased size or output.

Diminishing Marginal Returns

A principle stating that as additional units of a variable input are added to a fixed input, the additions to output will eventually decrease.