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Capacitor use ?

  1. Jul 15, 2008 #1
    What is the use of having capacitors in fans, cooler motors or other electric motors ?
  2. jcsd
  3. Jul 15, 2008 #2
    2 more questions :

    Can we charge a capacitor by DC , if yes then how ? Why does capacitor allow ac to flow through but not dc . For 3rd part i know frequency of dc is zero but in practical terms how will it be explained ?
  4. Jul 15, 2008 #3


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    Gold Member

    They are used to help start the motors. There are also running capacitors.
  5. Jul 15, 2008 #4
    you can.. you connect the DC voltage accross the terminals of the capacitor. but the current doesnt flow through it, at least at the steady state.
  6. Jul 17, 2008 #5
    DC current flows but stops when the C is charged.. When the voltage across the C = appiled voltage.
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