If 'α' is the firing angle and 'β' is the extinction angle of a given SCR, then which of the following relations between them is true?

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Question

This question was previously asked in

MPPGCL JE Electrical 28 April 2023 Shift 1 Official Paper

Answer 1

Explanation

The firing angle (α) is the point at which the SCR is triggered (turned on).
The extinction angle (β) is the point at which the SCR turns off (due to current dropping below the holding current or due to forced commutation).
The conduction angle(γ) represents the duration for which the SCR remains conducting.

Since conduction starts at α and ends at β, the conduction angle is given by:

Conduction angle = β - α

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