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X-ray Tube Operating Range
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... Thermistors and voltage dividing Voltage dividing circuits allow us to manipulate the size of a voltage in response to a given input. The principles of voltage dividing will be very important later in this chapter when we examine amplifier circuits and in the next chapter when we look at electrical- ...
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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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