Q- Select the correct answer:a- The high concentration of holes and electrons in the central junction of a thyristor decreases by theprocess of ................ during off transient period with a time tar. 1- Forced commutation, 2- Phasecommutation, 3- Load commutation, 4- Reverse bias commutation, 5- None of previous.Power Electronicsb- The non-trigger voltage of a thyristor is.............. 1- VBO, 2- VBn, 3- VGn, 4- VGD, 5- None of previous.is the limiting positive anode voltage above which thyristor may be damage. 1- PRV,2- PFV, 3- PAV, 4- PAK, 5- None of previous.C-d- The ripple frequency in the output voltage of single-phase half-controlled bridge AC/DC converter iswhen a > 60°. 1- 3f, 2-6f, 3- 2f, 4- f, 5- None of previous.*********e- The integrator in the firing circuit of 1-phase bridge AC/DC converter is necessary to havefiring angle range. 1-0-90°, 2-0-120°, 3-0-180°, 4-0-360°, 5- None of previous.f The harmonic contents in an inverter can be reduced through the use of modifiedVoltage, 2- Full, 3- Reduced, 4- Commutation, 5- None of previous.g- Continuous current operation in step-down chopper is gained when..............3- ton-ton, 4- tonT,1-√ √LC, 2-2√ √LC, 3-0.5√ √LmC,1-2EClo"2- EClo'

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Q- Select the correct answer: a- The high concentration of holes and electrons in the central junction of a thyristor decreases by the process of during off transient period with a time tar. 1- Forced commutation, 2- Phase commutation, 3- Load commutation, 4- Reverse bias commutation, 5- None of previous. ............... b- The non-trigger voltage of a thyristor is C- 1- VBO, 2- VBn, 3- VGn, 4- VGD, 5- None of previous. 1- PRV, is the limiting positive anode voltage above which thyristor may be damage. 2- PFV, 3- PAV, 4- PAK, 5- None of previous.

Q- Select the correct answer: a- The high concentration of holes and electrons in the central junction of a thyristor decreases by the process of during off transient period with a time tar. 1- Forced commutation, 2- Phase commutation, 3- Load commutation, 4- Reverse bias commutation, 5- None of previous. ............... b- The non-trigger voltage of a thyristor is C- 1- VBO, 2- VBn, 3- VGn, 4- VGD, 5- None of previous. 1- PRV, is the limiting positive anode voltage above which thyristor may be damage. 2- PFV, 3- PAV, 4- PAK, 5- None of previous.

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter12: Power System Controls

Section: Chapter Questions

Problem 12.4P

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