$70)$ What does the AC voltage output from a non$-$contact$$ eddy current $($proximity$)$ probe indicate?

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A$)$ The position of the center of the shaft

B$)$ The location of the key phasor on the shaft

C$)$ The dynamic motion of the shaft

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The answer is C but you can explain why and provide an example$$

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Part B

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What does the DC voltage output from a non$-$contact$$ eddy current $($proximity$)$ probe indicate?

Is it possible to have a DC$,$ voltage?

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