Two Long Parallel Wires Carry Unequal Currents in the Same

question 18

Multiple Choice

Two long parallel wires carry unequal currents in the same direction. The ratio of the currents is 3 to 1. The magnitude of the magnetic field at a point in the plane of the wires and 10 cm from each wire is 4.0 μT. What is the larger of the two currents?

• A) 5.3 A
• B) 3.8 A
• C) 4.5 A
• D) 3.0 A
• E) 0.5 A

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Definitions:

Defined Contribution Plan

A retirement plan where both the employee and employer contribute to an account, with the final benefit dependent on account performance.

Risk-free Return

The theoretical return on an investment with no risk of financial loss, typically less than the return on riskier investments.

Defined Contribution Plan

A retirement plan where an employee, employer, or both make contributions on a regular basis, with future benefits fluctuating based on investment earnings.