What is the functional purpose of component...

🔍 Key Concepts

• Identify what a ballast/inductor symbol looks like in a fluorescent lighting circuit and where it is normally placed (series or parallel with the tube). • Note that component 6 in figure B is already labeled "PFC" (power factor correction); compare that to the answer options that mention power factor or interference suppression. • Recall the main functions of a fluorescent lamp ballast: what it does at the instant of starting and what it does during normal running.

💭 Think About

• Is component 3 drawn in series with the fluorescent tube, or in parallel with the supply? How does that affect which tasks it can perform? • If one part is already labeled for power factor correction, which answer choice is now unlikely to match component 3? • Which device in a traditional fluorescent fixture is responsible for limiting current through the tube after it strikes, and how is that represented in a schematic?

✅ Before You Answer

• Verify whether component 3 is an inductor/coil symbol (typical ballast) or a capacitor symbol. • Confirm that power factor correction (PFC) in the diagram is associated with component 6, not 3. • Check which answer choice describes both the starting (high voltage surge) and running (current limiting) functions of a series ballast.

What is the functional purpose of component "3" of the circuit shown in figure "B" of the illustration? See illustration EL-0081.

provide power factor correction for the lighting fixture to compensate for the inductive effect of the ballast

provide the surge in voltage to strike the arc within the fluorescent tube and regulate tube current

provide radio interference suppression

provide the initial conditions for heating of the fluorescent tube filaments

🔍 Key Concepts

💭 Think About

✅ Before You Answer