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

question 44

Multiple Choice

The length of a certain wire is doubled and at the same time its radius is increased by a factor of 4. What is the change in the resistance of this wire?

• A) It is reduced by a factor of 8.
• B) It increases by a factor of 8.
• C) It is reduced by a factor of 4.
• D) It increases by a factor of 4.
• E) It stays the same.

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Definitions:

Subsidize

To provide financial support or assistance, often by the government, to lower the cost of producing goods or services.

Ideas In Motion

The concept of actively pursuing and implementing new ideas and innovations.

Money Rate

The rate of interest charged on short-term loans by banks to their customers.

Real Rate

The interest rate that has been adjusted for inflation, reflecting the real cost of borrowing or the real yield on an investment.