Jadeen Says That You Can Increase the Resistance of a Copper

question 7

Multiple Choice

Jadeen says that you can increase the resistance of a copper wire by hammering the wire to make it narrower and longer. Arnell says that you can increase its resistance by heating the wire. Which one, if either, is correct, and why?

• A) Arnell, because the resistivity of the wire increases when it is heated.
• B) Arnell, because the resistivity of the wire decreases when it is heated.
• C) Jadeen, because the resistivity of a wire is inversely proportional to its area and directly proportional to its length.
• D) Jadeen, because the resistivity of a copper wire does not decrease when it is hammered.
• E) Both are correct because (a) and (d) are both correct.

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Definitions:

NPV

Net Present Value, a financial metric used to analyze the profitability of an investment or project, calculated by subtracting the present value of cash outflows from the present value of cash inflows over a period of time.

Capital Budgeting

The process a business undergoes to evaluate potential major investments or expenses.

New Business Ventures

Initiatives or projects that involve starting a new business or expanding into new markets or products.

Equipment Replacement

The process of substituting old, worn-out, or obsolete equipment with newer, more efficient models or versions.