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Higher Study | Power Electronics and Drives

Thyristors Choppers Phase Controlled Rectifiers Electric Drives Power Semiconductor Diodes and Transistors Inverters
For an SCR, during turn-on and turn-off, the quantities responsible, respectively are
The device used for converting continuous DC to discontinuous DC is known as a/an
Thermal runaway of a thyristor occurs because
For thyristors pulse triggering is preferred than dc triggering because:
As compared to power MOSFET, a BJT has
The power supply whose output voltage varies with variation in input voltage or output load current is known as
The device whose symbol is seen to be Two SCR’s Inverse parallel connected is:
Identify the device whose symbol is given below
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
For a cycloconverter, when the displacement angle of the load is 0 degrees, each converter carries the load current when it operates in:  
A 3-phase semi-converter works as a six-pulse converter when the firing angle α is:
In ac drives, stable operating point is when
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
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