Patients undergoing an MRI occasionally report seeing flashes of light. Some practitioners assume that this results from electric stimulation of the eye by the emf induced by the rapidly changing fields of an MRI solenoid. We can do a quick calculation to see if this is a reasonable assumption. The human eyeball has a diameter of approximately 25 mm. Rapid changes in current in an MRI solenoid can produce rapid changes in field, with AB/At as large as 60 T/s. For the steps and strategies involved in solving a similar problem, you may view a Video Tutor Solution. ▼ Express your answer with the appropriate units. E = Submit Part B ON I μА Value Request Answer Units ? How does this compare to the 15 mV necessary to trigger an action potential? O This amount of emf is absolutely inadequate to trigger an action potential. O This amount of emf is almost adequate to trigger an action potential. O This amount of emf is inadequate to trigger an action potential. O This amount of emf is more than adequate to trigger an action potential.

Patients undergoing an MRI occasionally report seeing flashes of light. Some practitioners assume that this results from electric stimulation of the eye by the emf induced by the rapidly changing fields of an MRI solenoid. We can do a quick calculation to see if this is a reasonable assumption. The human eyeball has a diameter of approximately 25 mm. Rapid changes in current in an MRI solenoid can produce rapid changes in field, with AB/At as large as 60 T/s. For the steps and strategies involved in solving a similar problem, you may view a Video Tutor Solution. ▼ Express your answer with the appropriate units. E = Submit Part B ON I μА Value Request Answer Units ? How does this compare to the 15 mV necessary to trigger an action potential? O This amount of emf is absolutely inadequate to trigger an action potential. O This amount of emf is almost adequate to trigger an action potential. O This amount of emf is inadequate to trigger an action potential. O This amount of emf is more than adequate to trigger an action potential.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Question

Patients undergoing an MRI occasionally report
seeing flashes of light. Some practitioners assume
that this results from electric stimulation of the eye
by the emf induced by the rapidly changing fields of
an MRI solenoid. We can do a quick calculation to
see if this is a reasonable assumption. The human
eyeball has a diameter of approximately 25 mm.
Rapid changes in current in an MRI solenoid can
produce rapid changes in field, with AB/At as
large as 60 T/s.
For the steps and strategies involved in solving a
similar problem, you may view a
Video Tutor Solution.
loop circling the
Express your answer with the appropriate units.
E =
Submit
Part B
BHA
μÅ S
Value
Request Answer
t
CE ?
Units
How does this compare to the 15 mV necessary to trigger an action potential?
This amount of emf is absolutely inadequate to trigger an action potential.
O
This amount of emf is almost adequate to trigger an action potential.
O
This amount of emf is inadequate to trigger an action potential.
O This amount of emf is more than adequate to trigger an action potential.

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