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Questions and Answers
Which type of ballast is commonly used in fluorescent lamps to limit the current through the tube?
Which type of ballast is commonly used in fluorescent lamps to limit the current through the tube?
- Resistor
- Capacitor
- Inductor (correct)
- Electronic ballast
What is the purpose of an electrical ballast?
What is the purpose of an electrical ballast?
- To decrease the amount of current in an electrical circuit (correct)
- To regulate the power supply in an electrical circuit
- To stabilize the voltage in an electrical circuit
- To increase the amount of current in an electrical circuit
Which type of ballast is used in compact fluorescent lamps (CFLs) and high-intensity discharge lamps (HID lamps)?
Which type of ballast is used in compact fluorescent lamps (CFLs) and high-intensity discharge lamps (HID lamps)?
- Resistor
- Electronic ballast (correct)
- Capacitor
- Inductor
Why is an electrical ballast necessary in fluorescent lamps?
Why is an electrical ballast necessary in fluorescent lamps?
What happens to the terminal voltage of a load when current through the load increases?
What happens to the terminal voltage of a load when current through the load increases?
Which type of lamp uses fluorescence to produce visible light?
Which type of lamp uses fluorescence to produce visible light?
What is the typical luminous efficacy of fluorescent lighting systems?
What is the typical luminous efficacy of fluorescent lighting systems?
Why are fluorescent lamp fixtures more costly than incandescent lamps?
Why are fluorescent lamp fixtures more costly than incandescent lamps?
What is the luminous efficacy of an incandescent bulb?
What is the luminous efficacy of an incandescent bulb?
What type of light does a fluorescent lamp produce to excite the phosphor coating?
What type of light does a fluorescent lamp produce to excite the phosphor coating?
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