A Straight Wire of Length Is Oriented East-West and Is

question 24

Multiple Choice

A straight wire of length is oriented east-west and is in a magnetic field B pointing north.The wire is moving downward at a constant speed v.If the resistance of the rod is R,what is the current through the rod?

• A)R/B v
• B)B v/R
• C)B^{2 2}v²/R²
• D)not given

---

Definitions:

Marginal Benefit

The added value or enjoyment derived from the consumption of an extra unit of a good or service.

Rational Decisionmaker

An individual who makes choices that maximize their benefits while minimizing costs, based on available information and rational assessment.

Fuel-efficient Cars

Vehicles designed to use less fuel for traveling the same distance compared to standard vehicles, reducing operating costs and environmental impact.

Tax

A mandatory financial charge or other type of levy imposed by a government on individuals or businesses to fund public expenditures and services.