How Dynamic Microphones and Loudspeakers Work - Physics
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Questions and Answers

In a dynamic microphone, what causes the coil to move and induces current in the coil?

  • Pressure variations in the sound waves (correct)
  • Movement of the loudspeaker cone
  • Electric current flowing through the coil
  • Static magnetic field

What interaction causes the coil to move in a loudspeaker?

  • Magnetic field from the magnet and electric current (correct)
  • Pressure variations in the sound waves
  • Static magnetic field
  • Coil overheating

What happens when the coil in a dynamic microphone moves?

  • Magnetic field cuts through the coil
  • Magnet is fixed at the centre
  • Electric current is produced by the loudspeaker
  • Induction of current in the coil (correct)

How does a dynamic microphone differ from a condenser microphone based on the provided text?

<p>Dynamic microphones have a free-moving coil, while condenser microphones have a fixed coil. (D)</p> Signup and view all the answers

What initiates the movement of the cone in a loudspeaker?

<p>Electric current flowing into the coil (C)</p> Signup and view all the answers

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