The Length of a Certain Wire Is Kept Same While

question 126

Multiple Choice

The length of a certain wire is kept same while its radius is doubled.What is the new resistance of this wire?

• A)It is increased by a factor of 2.
• B)It is increased by a factor of 4.
• C)It is reduced by a factor of 2.
• D)It is reduced by a factor of 4.
• E)It is reduced by a factor of 8.

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Definitions:

Short-Run Costs

Costs that vary with the level of output in the short term, where some inputs are fixed.

Fertilizer

A substance, either chemical or organic, introduced to soil or land to improve its fertility and boost the growth of plants.

Purely Competitive Industry

Markets where many sellers are offering a homogeneous product, and no single seller can influence the price.

Short-Run Costs

Costs that vary with the level of output in the short term, including both variable and fixed costs.