a.8.) In a dynamic pickup or microphone, incident sound waves cause AF current to flow in the coil as a result of (a) the coil's motion within a magnetic field. (b) the coil's motion within an electrostatic field. (c) a DC voltage applied to the coil. (d) changes in the capacitive reactance across the coil. a.9.) A motor whose shaft rotates in discrete increments (not continuously) is called (a) an incremental motor. (c) a fractional motor. (d) a selsyn. (b) a stepper motor. a.10.) A photoelectric proximity sensor might have trouble detecting (a) a gray curtain. (b) a black wall. (c) a red ball. (d) All of the above 15

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a.8.) In a dynamic pickup or microphone, incident sound waves cause AF current to flow in the coil as a
result of
(a) the coil's motion within a magnetic field. 67)
(b) the coil's motion within an electrostatic field.
(c) a DC voltage applied to the coil.
(d) changes in the capacitive reactance across the coil.
a.9.) A motor whose shaft rotates in discrete increments (not continuously) is called
(a) an incremental motor.
(b) a stepper motor.
(c) a fractional motor.
(d) a selsyn.
a.10.) A photoelectric proximity sensor might have trouble detecting
(a) a gray curtain.
(c) a red ball.
(b) a black wall.
(d) All of the above
15
Transcribed Image Text:a.8.) In a dynamic pickup or microphone, incident sound waves cause AF current to flow in the coil as a result of (a) the coil's motion within a magnetic field. 67) (b) the coil's motion within an electrostatic field. (c) a DC voltage applied to the coil. (d) changes in the capacitive reactance across the coil. a.9.) A motor whose shaft rotates in discrete increments (not continuously) is called (a) an incremental motor. (b) a stepper motor. (c) a fractional motor. (d) a selsyn. a.10.) A photoelectric proximity sensor might have trouble detecting (a) a gray curtain. (c) a red ball. (b) a black wall. (d) All of the above 15
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