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Chapter no - WordPress.com
Chapter no - WordPress.com

... The initial voltage on capacitor is assumed to be zero. In the first positive half cycles diode D1 is forward biased and D2 is reverse biased and acts as open switch. As Diode D1 conducts its supplies the charging current to the capacitor. Capacitors starts charging through diode D1 and capacitor ch ...
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Electrical ballast



An electrical ballast is a device intended to limit the amount of current in an electric circuit. A familiar and widely used example is the inductive ballast used in fluorescent lamps, to limit the current through the tube, which would otherwise rise to destructive levels due to the tube's negative resistance characteristic.Ballasts vary in design complexity. They can be as simple as a series resistor or inductor, capacitors, or a combination thereof or as complex as electronic ballasts used with fluorescent lamps and high-intensity discharge lamps.
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