A Rod (Length = 80 Cm) with a Rectangular Cross

question 22

Multiple Choice

A rod (length = 80 cm) with a rectangular cross section (1.5 mm × 2.0 mm) has a resistance of 0.20 Ω. What is the resistivity of the material used to make the rod?

• A) 6.0 × 10−⁷ Ω ⋅ m
• B) 3.8 × 10−⁷ Ω ⋅ m
• C) 7.5 × 10−⁷ Ω ⋅ m
• D) 3.0 × 10−⁷ Ω ⋅ m
• E) 4.8 × 10−⁷ Ω ⋅ m

---

Definitions:

Interest Rate

The slice of a loan that generates interest charges for the borrower, often cited as an annual percentage of the yet-to-be-paid loan amount.

Inflation

An economic condition characterized by a general increase in prices and fall in the purchasing value of money.

Utility Function

A mathematical representation of how different bundles of goods or services rank according to their utility (satisfaction) for an individual or entity.

Consumption

The use of goods and services by households or individuals, typically measured in economic studies to assess economic activity or well-being.