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Power Electronics
The capacitance of reversed bised junction J2 in a thyristor is CJ2 = 20 pF and can be assumed to be independant of the off state voltage. The limiting value of the charging current to turn on the thyristor is 16 mA. What is the critical value of dv/dt?
1200 V/µs.
600 V/µs.
800 V/µs.
1000 V/µs.
1200 V/µs.
600 V/µs.
800 V/µs.
1000 V/µs.
Answer
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Related Question
Power Electronics
Figure shows two thyristors rated 400 A sharing a load current. Current through T2 is 180A. Current through T1 will be
120 A.
100 A.
150 A.
110 A.
120 A.
100 A.
150 A.
110 A.
Answer
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Power Electronics
The normal way to turn on a diac is by ___________.
None of these
Gate voltage
Breakover voltage
Gate current
None of these
Gate voltage
Breakover voltage
Gate current
Answer
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Power Electronics
Let of a thyristor Vc1, Vc2, Vc3 are forward break over voltage for gate current Ig1, Ig2, Ig3 respectively. Then
Vc1 > Vc2 > Vc3 when Ig1= Ig2
Vc1 > Vc2 > Vc3 when Ig1 < Ig2 < Ig3.
Vc1 = Vc2 = Vc3 any value of Ig.
Vc1 > Vc2 > Vc3 when Ig1 > Ig2 > Ig3.
Vc1 > Vc2 > Vc3 when Ig1= Ig2
Vc1 > Vc2 > Vc3 when Ig1 < Ig2 < Ig3.
Vc1 = Vc2 = Vc3 any value of Ig.
Vc1 > Vc2 > Vc3 when Ig1 > Ig2 > Ig3.
Answer
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Power Electronics
In a UJT, the p-type emitter is ___________ doped
Heavily
Moderately
Lightly
None of these
Heavily
Moderately
Lightly
None of these
Answer
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Power Electronics
In reverse blocking mode of a thyristor
junction J1, J3 is in reverse bias and J2 is in forward bias.
junction J2 is in reverse bias and J1, J3 is in forward bias.
junction J1 and J2 is in forward bias and J3 is in reverse bias.
junction J3 is in forward bias and J1, J2 in reverse bias.
junction J1, J3 is in reverse bias and J2 is in forward bias.
junction J2 is in reverse bias and J1, J3 is in forward bias.
junction J1 and J2 is in forward bias and J3 is in reverse bias.
junction J3 is in forward bias and J1, J2 in reverse bias.
Answer
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