What is the functional purpose of component...

Question 1 / 2707066636eed28f7522a1c51d630

Question 1 of 2707066636eed28f7522a1c51d630

What is the functional purpose of component "5" as shown in figure "B" of the illustration? Illustration EL-0081

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Question 1 of 27070

What is the functional purpose of component "5" as shown in figure "B" of the illustration? Illustration EL-0081

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🔍 Key Concepts

• Trace how current flows at startup versus normal running in the figure B circuit • Role of the ballast (inductor 3) in limiting current to the fluorescent tube • What the small device beneath the tube (component 5) typically does in a preheat fluorescent lamp circuit

💭 Think About

• Look at which components are in series with the tube filaments when the lamp is first switched on: what must happen before the arc can strike inside the tube? • After the lamp is lit and the arc is established, does component 5 still need to be active, or does another component take over current regulation? • Compare the function of component 6 (labeled PFC) with what component 5 is doing—are they likely to have the same purpose?

✅ Before You Answer

• Confirm which component in the diagram is explicitly labeled PFC (power factor correction)** and eliminate any option that duplicates that role for component 5 • Identify whether component 5 is normally closed then opens, or open then closes, and relate that behavior to starting vs running conditions • Decide whether component 5’s main job is heating filaments, regulating current, or correcting power factor, based on its position relative to the tube and ballast

Question 1 of 27070

What is the functional purpose of component "5" as shown in figure "B" of the illustration? Illustration EL-0081

to rapidly strike the arc to fire the tube nearly instantly after the lighting fixture switch is closed

provide power factor correction

regulate the current drawn by the fluorescent tube once the arc has been stricken

initially heat the fluorescent tube filaments at startup and cause the ballast to strike the arc to fire the tube after warm up

Question 1 / 2707066636eed28f7522a1c51d630

Question 1 of 2707066636eed28f7522a1c51d630

What is the functional purpose of component "5" as shown in figure "B" of the illustration? Illustration EL-0081

Back

Question 1 of 27070

What is the functional purpose of component "5" as shown in figure "B" of the illustration? Illustration EL-0081

If the question has a related picture, it will appear here.