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Higher Study | Power Electronics and Drives | Thyristors

For an SCR, during turn-on and turn-off, the quantities responsible, respectively are
Thermal runaway of a thyristor occurs because
For thyristors pulse triggering is preferred than dc triggering because:
The device whose symbol is seen to be Two SCR’s Inverse parallel connected is:
Why does an SCR fail to turn off even when it is in conducting mode and a reverse voltage is applied between anode and cathode?
When cathode is positive with respect to anode in an SCR, the number of blocked p-n junctions is
An SCR is turned off when its turn-off time is
In a commutation circuit employed to turn off an SCR, satisfactory turn off is obtained when
For the V-I characteristics if an SCR, which of the following statements are correct? 1. It will trigger when the applied voltage is more than the forward breakover voltage 2. Holding current is greater than the latching current 3. When reverse biased, a small of leakage current will flow. 4. It can be triggered without gate current
For an SCR which of the following increases when a resistor is connected across its gate and cathode?
In a GTO, anode current begins to fall when gate current.
In the SCR, when the anode terminal is positive with respect to the cathode terminal, the number of blocked PN junction is:
How many terminals are in DIAC ?
How can the 3rd harmonic current be filtered in Thyristor-controlled reactor?
In an SCR with four layers represented as shown in the given figure, which are the layers that are equally doped?
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