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In fluorescent tube, a ballast resistance is connected in series with the choke
- a)when the tube is operated on dc supply
- b)when the tube is operated on ac supply
- c)to reduce radio-interference
- d)to reduce stroboscopic effects
Correct answer is option 'A'. Can you explain this answer?
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In fluorescent tube, a ballast resistance is connected in series with ...
Ballast Resistance in Fluorescent Tube
When a fluorescent tube is operated on a DC supply, the ballast resistance is connected in series with the choke to limit the current flowing through the tube. This is necessary because the resistance of the tube decreases as it heats up, which would cause an increase in current flow and eventually damage the tube.
The ballast resistance also helps to provide a stable voltage across the tube during operation, as the voltage drop across the choke can vary depending on the frequency of the AC supply.
Importance of Ballast Resistance
1. Limiting Current Flow: The ballast resistance limits the current flowing through the tube, which helps to prevent damage and ensures that the tube operates within its safe limits.
2. Providing Stable Voltage: The ballast resistance helps to provide a stable voltage across the tube during operation, which is important for maintaining consistent light output.
3. Reducing Energy Consumption: By limiting the current flow through the tube, the ballast resistance helps to reduce energy consumption and improve the efficiency of the lighting system.
Conclusion
In summary, the ballast resistance is an important component of a fluorescent lighting system when the tube is operated on a DC supply. It helps to limit current flow, provide a stable voltage, and improve energy efficiency.
When a fluorescent tube is operated on a DC supply, the ballast resistance is connected in series with the choke to limit the current flowing through the tube. This is necessary because the resistance of the tube decreases as it heats up, which would cause an increase in current flow and eventually damage the tube.
The ballast resistance also helps to provide a stable voltage across the tube during operation, as the voltage drop across the choke can vary depending on the frequency of the AC supply.
Importance of Ballast Resistance
1. Limiting Current Flow: The ballast resistance limits the current flowing through the tube, which helps to prevent damage and ensures that the tube operates within its safe limits.
2. Providing Stable Voltage: The ballast resistance helps to provide a stable voltage across the tube during operation, which is important for maintaining consistent light output.
3. Reducing Energy Consumption: By limiting the current flow through the tube, the ballast resistance helps to reduce energy consumption and improve the efficiency of the lighting system.
Conclusion
In summary, the ballast resistance is an important component of a fluorescent lighting system when the tube is operated on a DC supply. It helps to limit current flow, provide a stable voltage, and improve energy efficiency.
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In fluorescent tube, a ballast resistance is connected in series with the chokea)when the tube is operated on dc supplyb)when the tube is operated on ac supplyc)to reduce radio-interferenced)to reduce stroboscopic effectsCorrect answer is option 'A'. Can you explain this answer?
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