Two Long Parallel Wires Carry Unequal Currents in Opposite Directions

question 71

Multiple Choice

Two long parallel wires carry unequal currents in opposite directions. 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) 0.5 A
• B) 1.0 A
• C) 1.5 A
• D) 2.0 A
• E) 3.0 A

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Definitions:

Visual Reflexes

Involuntary responses to visual stimuli, such as blinking or pupil contraction.

Midbrain

A part of the brainstem involved in vision, hearing, motor control, sleep/wake, arousal (alertness), and temperature regulation.

Pons

A part of the brain located in the brainstem, connecting the medulla oblongata and the thalamus, playing a key role in controlling breathing, communication between different parts of the brain, and sensations such as hearing, taste, and balance.

Thalamus

Structure that acts as a relay station for sensory information heading to the cerebral cortex for interpretation; a subdivision of the diencephalon.