We Find That 2N Current Loops Are Coplanar and Coaxial

question 52

Multiple Choice

We find that 2N current loops are coplanar and coaxial. The first has radius a and current I. The second has radius 2a and current 2I, and the pattern is repeated up to the Nth, which has radius Na and current NI. The current in the loops alternates in direction from loop to loop as seen from above. Thus the current in the first loop is counterclockwise, in the next clockwise, up to the last loop where it is again clockwise. The magnitude of the magnetic field at the center of the loops is

• A) 0.
• B) .
• C) .
• D) .
• E) .

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Definitions:

Ciliary Body

A structure in the eye composed of ciliary muscle and ciliary processes, involved in the production of aqueous humor and adjustment of the lens for focusing.

Pupil

The opening in the center of the iris of the eye that allows light to enter the retina.

Special Senses

The senses including vision, hearing, taste, smell, and equilibrium, which have specialized organs devoted to them.

Complex Sensory Organs

Organs specialized for the perception of stimuli such as sight, hearing, balance, taste, and smell, integrating multiple structural and functional components.