The Length of a Certain Wire Is Doubled and at the Same

question 56

Multiple Choice

The length of a certain wire is doubled and at the same time its radius is also doubled.What is the new resistance of this wire?

• A)It stays the same.
• B)It is 2 times as large.
• C)It is 4 times as large.
• D)It is 1/2 as large.
• E)It is 1/4 as large.

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Definitions:

Residual Income

The amount of income that an entity has after all costs and expenses, including the cost of capital, have been deducted.

Return On Investment

A measure of the profitability of an investment, calculated by dividing the gain from the investment by the cost of the investment.

Combined Margin

A metric that combines multiple types of profit margins (such as gross, operating, or net margin) to assess overall performance.

Contribution Margin Ratio

The percentage of sales revenue remaining after variable costs are deducted, indicating how much contributes to fixed costs and profit.