Jadeen Says That You Can Increase the Resistance of a Copper

question 9

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

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Definitions:

Induced Consumption

An increase in spending on goods and services caused by an increase in income, reflecting a direct relationship between income levels and consumer spending.

APS

Average Propensity to Save, the fraction of income that is saved rather than spent on consumption goods.

APC

This stands for Average Propensity to Consume, which is the percentage of income that an individual or population spends rather than saving.

APS

Average Propensity to Save; it is a macroeconomic term that represents the proportion of income that is saved rather than spent on consumption. It is calculated by dividing total savings by total income.