All electroacoustic microphones contain .

A) a coil separated from a magnet by a dielectric

B) a membrane

C) a piezoelectric crystal

D) two stator plates that act as charged capacitors

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A) a coil separated from a magnet by a dielectric

B) a membrane

Explanation:

When sound waves enter the microphone, they meet the diaphragm, which is a membrane that moves back and forth when sound waves hit it. This vibration is converted into an electrical signal by the microphone.

The coil is attached to the diaphragm, so when the diaphragm starts vibrating, so does the coil.

As the coil vibrates, it moves back and forth between a magnet. Movement between the magnetically charged coil and the magnet creates electrical energy in the signal.

The magnet creates a magnetic field for the coil so that vibrations can create an electrical signal.

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.

i just calculated it all out, and not including weekends, and all the different days off. as of this school year (2018-2019) students are spending 2198 hours in school this year