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Power Electronics
A 200 A thyristor is to be operated in parallel with a 300 A thyristor. The ON state voltage drops are 1.5 V and 1.2 Volts. What is the value of resistance R to be connected in series with each thyristor, so that current through the combination is 500 A and each of them is fully loaded ?
0.3 ohm
3.0 ohm
0.03 ohm
0.3 ohm
0.3 ohm
3.0 ohm
0.03 ohm
0.3 ohm
Answer
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Power Electronics
To turn on UJT, the forward bias on the emitter diode should be ___________ the peak point voltage.
Less than
More than
Equal to
None of these
Less than
More than
Equal to
None of these
Answer
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Power Electronics
IGBT combines the advantages of
BJTs and MOSFETs.
SITs and MOSFETs.
None of these.
BJTs and SITs.
BJTs and MOSFETs.
SITs and MOSFETs.
None of these.
BJTs and SITs.
Answer
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Power Electronics
After peak point, the UJT operates in the ___________ region.
Negative resistance
Saturation
Cut-off
None of these
Negative resistance
Saturation
Cut-off
None of these
Answer
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Power Electronics
A diac has ___________ terminals.
Three
Four
Two
None of these
Three
Four
Two
None of these
Answer
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Power Electronics
Which of following is normally ON device
BJT.
IGBT.
SIT.
TRIAC.
BJT.
IGBT.
SIT.
TRIAC.
Answer
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