Power Electronics [GATE (Graduate Aptitude Test in Engineering) Electrical Engineering (EE)]: Questions 1 - 4 of 60
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Question 1
Appeared in Year: 2019
Question MCQ▾
The enhancement type MOSFET in the circuit below operates according to the square law. μA/ , the threshold voltage is 500 mV. Ignore channel length modulation. The output voltage is
Choices
Choice (4) | Response | |
---|---|---|
a. | 600 mV | |
b. | 500 mV | |
c. | 2 V | |
d. | 100 mV |
Question 2
Appeared in Year: 2020
Question Numeric Answer▾
In the dc-dc converter circuit shown, switch Q is switched at a frequency of 10 kHz with a duty ratio of 0. All components of the circuit are ideal, and the initial current in the inductor is zero. Energy stored in the inductor in mJ (rounded off to 2 decimal places) at the end of 10 complete switching cycles is ________
EditQuestion 3
Appeared in Year: 2020
Question MCQ▾
Thyristor is triggered at an angle (in degree) and at angle of , in each cycle of sinusoidal input voltage. Assume both thyristors to be ideal. To control the load power over the range of 0 to 2 kW, the minimum range of variation in α is:
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. |
Question 4
Appeared in Year: 2019
Question Numeric Answer▾
A single-phase fully-controlled thyristor converter is used to obtain an average voltage of 180 V with 10 A constant current to feed a DC load. It is fed from single-phase AC supply of 230 V, 50 Hz. Neglect the source impedance. The power factor (round off to two decimal places) of AC mains is ________.
Edit