Saturday, 4 May 2013

Question. . !

Question: Why we use a capacitor in electric fan?

  • Capacitor is used for both starting the fan and improving power factor.
  • The voltage taken by the fan during running has lagging power factor and in order to run the fan we need leading power factor. The capacitor increases the power factor so we use capacitor in fan to increase power factor.
  • To give a start up for any instrument, capacitor is used in electronics by using capacitor in start up there is a charge accumulation in between the plates of capacitor, which is discharged again and gives a start to instrument otherwise we have to use a very high voltage to the instrument.


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