Motors, Generators, Speakers and Microphones

1
Motors, Generators, Speakers and Microphones

• Honors Physics
• PPT 8-4

2
Electromagnet
3
Application (Solenoid)
4
Motors

• Transfers electrical energy to mechanical energy

5
Generator

• Takes mechanical energy and transforms it into
  electrical energy

6
Parts of a Motor

• Commutator Armature Magnet Wires

7
Commutator for AC and DC Circuits
8
Speaker

• Try to describe how a speaker works

9
Speaker

• Permanent magnet
• Coil of wire wound around the magnet
• AC current goes through a coil and it causes the
  cone to vibrate

10
Microphone

• Now can you explain how a microphone works?
  (Hint It is the opposite of a speaker)

11
The Alternator
12
Tape Recorder / VCR/ Drive Storage