Physics · Power Electronics

A technician observes that a silicon controlled rectifier (SCR) is conducting continuously in a DC chopper circuit without turning off. Which of the following methods can be used to turn off the SCR?

Verified Solution4 OptionsUpdated: October 2026👁️1 View

1Connect an inductor coil in parallel with the SCR.
2Apply another positive gate pulse to the gate terminal of the SCR.
3Bring the anode current below the holding current by short-circuiting the anode and cathode terminals.✓
4Apply a negative gate pulse to the gate terminal of the SCR.

Correct answer

Bring the anode current below the holding current by short-circuiting the anode and cathode terminals.

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