apply AF voltage to the plates of an electrostatic transducer, the electric field between the plates fluctuates in intensity, causing a. a magnetic field that moves the coil, producing sound waves. b. the capacitance to vary, thereby generating a phase shift. c. forces that move the flexible plate, producing sound waves. d. the plates to charge and discharge, producing AF current. 3. Which of the following devices is a form of RF transducer? a. A small loop antenna
Choose the correct answer
1.A robot can use a back-pressure sensor to
a.measure the intensity of visible light.
b. regulate the torque produced by an electric drill.
c. determine the orientation of magnetic lines of flux.
d. regulate the output of an acoustic transducer.
2. When you apply AF voltage to the plates of an electrostatic transducer, the electric field between the plates fluctuates in intensity, causing
a. a magnetic field that moves the coil, producing sound waves.
b. the capacitance to vary, thereby generating a phase shift.
c. forces that move the flexible plate, producing sound waves.
d. the plates to charge and discharge, producing AF current.
3. Which of the following devices is a form of RF transducer?
a. A small loop antenna
b. A back-pressure sensor
c. An elastomer
d. An epipolar navigation sensor
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