# DBATU Model MCQ – Power Electronics

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Welcome to your Power Electronics, dated April 22, 2021

1. The typical ratio of latching current to holding current in a 20A thyristor isDeselect Answer
2. Circuit turn-off time of an SCR is defined as the timeDeselect Answer
3. The MOSFET has
(i)Higher Power handling capability than BJT
(ii) Faster switching speed than BJT
(iii) High on state resistance
(iv) Secondary breakdown voltage problem which of the above statements are incorrect?Deselect Answer
4. A single phase full - wave half controlled bridge converter feeds an inductive loaD. The two SCRs in the converter are connected to a common DC bus. The converter has to have a free wheeling diodeDeselect Answer
5. The average output voltage(Vdc) of the full wave diode bridge rectifier isDeselect Answer
6. The typical ratio of latching current to holding current in a 20A thyristor isDeselect Answer
7. The main disadvantage of voltage doubler power supply circuit isDeselect Answer
8. The output of a rectifier circuit without filter is
9. For a JFET, when VDS is increased beyond the pinch off voltage, the drain currentDeselect Answer
10. Compared to Power MOSFET, the Power BJT hasDeselect Answer
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