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:

Cochlea

A spiral-shaped, fluid-filled inner ear structure that is essential for hearing as it transfers sound vibrations to nerve impulses.

Vestibule

An entrance or enclosed area just inside the entrance of a building, or, in anatomy, a cavity, chamber, or channel opening into another cavity, especially of the ear, nose, or mouth.

Romberg Test

A neurological test that assesses the sense of balance and proprioception, wherein an individual is asked to stand with feet together and eyes closed to detect problems in the vestibular or proprioceptive systems.

Vestibular Apparatus

A complex system within the inner ear that provides information about spatial orientation and balance.