A Long Wire Is Known to Have a Radius Greater

question 31

Multiple Choice

A long wire is known to have a radius greater than 4.0 mm and to carry a current uniformly distributed over its cross section. If the magnitude of the magnetic field is 0.285 mT at a point 4.0 mm from the axis of the wire and 0.200 mT at a point 10 mm from the axis, what is the radius of the wire?

• A) 4.6 mm
• B) 7.1 mm
• C) 5.3 mm
• D) 12 mm
• E) 10 mm

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Definitions:

Discretionary Aggregate Demand

Demand for goods and services in the economy that is influenced by government policy decisions, beyond automatic stabilizers.

Economic Tradition

The historical and cultural practices, beliefs, and philosophies that influence and shape an economy's structure, policy, and development.

Policy Rule

A guideline or protocol for economic policy that stipulates specific actions or responses to changes in economic indicators.

Monetarists' Prescription

Recommendations or policies suggested by monetarists, focusing on controlling the money supply to manage economic stability and inflation.