If a Metallic Wire of Cross Sectional Area 3

question 15

Multiple Choice

If a metallic wire of cross sectional area 3.0 × 10−⁶ m² carries a current of 8.0 A and has a mobile charge density of 4.24 × 10²⁸ carriers/m³,what is the average drift velocity of the mobile charge carriers? (charge value = 1.6 × 10−¹⁹ C)

• A) 3.1 × 10³ m/s
• B) 1.9 × 10³ m/s
• C) 6.3 × 10−⁴ m/s
• D) 3.9 × 10−⁴ m/s
• E) 8 × 10−6 m/s

---

Definitions:

Working Capital

The difference between a company's current assets and current liabilities, representing the liquidity available to run its operations.

Contribution Margin

The amount by which the sale of a product or service exceeds its variable costs, used to cover fixed costs and generate profit.

Incremental Annual Net Cash Inflows

The additional cash flow a company receives from undertaking a project, after accounting for direct costs and revenue changes.

Donut Maker

A kitchen appliance used specifically for making donuts.