Question: Experiments to study vision often need to track the movements of a subject??s eye. One way of doing so is to have the subject sit

Experiments to study vision often need to track the movements of a subject??s eye. One way of doing so is to have the subject sit in a magnetic field while wearing special contact lenses with a coil of very fine wire circling the edge. A current is induced in the coil each time the subject rotates his eye. Consider the experiment of FIGURE P30.60 in which a 20-turn, 6.0-mm-diameter coil of wire circles the subject??s cornea while a 1.0 T magnetic field is directed as shown. The subject begins by looking straight ahead.What emf is induced in the coil if the subject shifts his gaze by 5? in 0.20 s?

Cornea 6.0-mm-diameter coil Eye FIGURE P30.60

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