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Single Phase Series AC Circuits
Single Phase Series AC Circuits

... 1. An alternating voltage given by v = 100sin240t volts is applied across a coil of resistance 32Ω and inductance 100 mH. Determine (a) the circuit impedance, (b) the current flowing, (c) the p.d. across the resistance and (d) the p.d. across the inductance. (40Ω, 1.77A, 56.64v, 42.48v) 2. A coil of ...
Capacitor Discharge Ignition
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... While we all recognize the desirability of a 100% stock vehicle, an electronic ignition can greatly ease the problems of starting an older vehicle as well as prolonging the life of the points and plugs (which are sometimes hard to get). The capacitor discharge ignition system described in this artic ...
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... This is clearly not suitable as a DC power source since the load is looking for a constant DC value. This is where the capacitor, C, and the LM78XX voltage regulator of Figure 1 become important. A typical voltage regulator requires that the voltage on the input pin maintain a certain margin above t ...
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... • Each battery pack contains up to 3.4 MJ of energy • Every pack will contain a mechanical safety switch for transport/assembly • A fuse will provide absolute current limiting • During normal operation, the pack will be switched using a FET controlled by its microcontroller ...
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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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