■ Question: Why the Direction of Rotation of a TABLE Fan &
CEILING Fan is different?
■ Answer: In table fan rotor is rotating part, but in ceiling fan stator is rotating part, so the direction of rotation is different. Transformer is not rotating because for rotating magnetic field is required which is produced only when the current is passed through the windings which are displaced physically by 120degrees and phase difference of 120 degrees where as in transformer there is no physical displacement of 120degrees hence transformer cannot rotate.
■ Question: Why we use a capacitor in an electric fan?
■ Answer:
1. Capacitor is used for both starting the electric fan and improving power factor.
2. 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 its power factor
3. to give a quick start-up for any instrument, capacitor is used in electronics, by using capacitor in the start-up there is a charge accumulation in between the plates of capacitor,which is discharged again and gives a quick start to the instrument otherwise we have to use a very high voltage to the instrument.
CEILING Fan is different?
■ Answer: In table fan rotor is rotating part, but in ceiling fan stator is rotating part, so the direction of rotation is different. Transformer is not rotating because for rotating magnetic field is required which is produced only when the current is passed through the windings which are displaced physically by 120degrees and phase difference of 120 degrees where as in transformer there is no physical displacement of 120degrees hence transformer cannot rotate.
■ Question: Why we use a capacitor in an electric fan?
■ Answer:
1. Capacitor is used for both starting the electric fan and improving power factor.
2. 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 its power factor
3. to give a quick start-up for any instrument, capacitor is used in electronics, by using capacitor in the start-up there is a charge accumulation in between the plates of capacitor,which is discharged again and gives a quick start to the instrument otherwise we have to use a very high voltage to the instrument.
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