The Diagrams Show Three Circuits Consisting of Concentric Circular Arcs

question 28

Multiple Choice

The diagrams show three circuits consisting of concentric circular arcs (either half or quarter circles of radii r, 2r, and 3r) and radial lengths. The circuits carry the same current. Rank them according to the magnitudes of the magnetic fields they produce at C, least to greatest.

• A) 1, 2, 3
• B) 3, 2, 1
• C) 1, 3, 2
• D) 2, 3, 1
• E) 2, 1, 3

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Definitions:

Neurotransmitter

Chemical messengers that transmit signals across a chemical synapse from one neuron (nerve cell) to another target neuron, muscle cell, or gland cell.

Tranquilizers

Substances often prescribed to soothe or calm the nervous system, assisting in alleviating symptoms of anxiety and stress.

L-DOPA

A chemical precursor of dopamine used as a medication to treat Parkinson's disease and dopamine-responsive dystonia due to its ability to cross the protective blood-brain barrier.

MPTP

A prodrug to the neurotoxin MPP+, which causes permanent symptoms of Parkinson's disease by destroying dopaminergic neurons in the brain.