An automated stage lighting system uses a thyristor-based dimmer circuit to control a halogen lamp. If the thyristor firing angle is excessively delayed, which consequence follows?

💡 Explanation

When the thyristor firing angle is excessively delayed, the halogen lamp receives a chopped waveform with a large harmonic content. This introduces significant hysteresis distortion in the color temperature because the lamp filament cools and heats unevenly, therefore creating unwanted color shifts rather than smooth dimming, unlike a pure sinusoidal waveform.

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