Neon lamps can operate on both AC (alternating current) and DC (direct current).
Here's a more detailed explanation:
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AC Operation: When a neon lamp is powered by AC, both electrodes alternate in polarity. This causes the gas around both electrodes to glow, producing a more even and consistent light output. Most neon signs and lamps utilize AC power.
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DC Operation: When a neon lamp is powered by DC, only the gas around the negative electrode (cathode) will glow. The area around the positive electrode (anode) remains dark. This is because the electrons emitted from the cathode are responsible for ionizing the neon gas and creating the visible glow.
| Feature | AC Operation | DC Operation |
|---|---|---|
| Glow Location | Around both electrodes | Around negative electrode |
| Light Output | Even and consistent | Uneven |
| Polarity | Alternating | Fixed |
In summary, while neon lamps can function with either AC or DC, AC is the more common and practical choice for applications requiring consistent and even illumination.
