1
GATE EE 2009
MCQ (Single Correct Answer)
+2
-0.6
Match the switch arrangements on the top row to be steady $$-$$ state $$V$$ - $$I$$ characteristics on the lower row. The steady state operating points are shown by large black dots. GATE EE 2009 Power Electronics - Power Semiconductor Devices Question 6 English 1 GATE EE 2009 Power Electronics - Power Semiconductor Devices Question 6 English 2
A
$$A - i,\,\,B - ii,\,\,C - iii,\,\,D - iv$$
B
$$A - ii,\,\,B - iv,\,\,C - i,\,\,D - iii$$
C
$$A - iv,\,\,B - iii,\,\,C - i,\,\,D - ii$$
D
$$A - iv,\,\,B - iii,\,\,C - ii,\,\,D - i$$
2
GATE EE 2009
MCQ (Single Correct Answer)
+2
-0.6
In the chopper circuit shown, the main thyristor $$\left( {{T_M}} \right)$$ is operated at a duty ratio of $$0.8$$ which is much larger than the commutation interval. If the maximum allowable reapplied $${{dV} \over {dt}}$$ on $${T_M}$$ is $$50$$ $$V/\mu s,$$
what should be the theoretical minimum value of $${C_1}?$$. Assume current ripple through $${L_0}$$ to be negligible. GATE EE 2009 Power Electronics - Choppers and Commutation Techniques Question 5 English
A
$$0.2\,\,\mu \,F$$
B
$$0.02\,\,\mu \,F$$
C
$$2\,\,\mu \,F$$
D
$$20\,\,\mu \,F$$
3
GATE EE 2009
MCQ (Single Correct Answer)
+2
-0.6
The Current Source Inverter shown in Figure is operated by alternately turning on thyristor pairs $$\left( {{T_1},\,\,{T_2}} \right)$$ and $$\left( {{T_3},\,\,{T_4}} \right).$$ If the load is purely resistive, the theoretical maximum output frequency obtainable will be GATE EE 2009 Power Electronics - Inverters Question 14 English
A
$$125$$ $$kHz$$
B
$$250$$ $$kHz$$
C
$$500$$ $$kHz$$
D
$$50$$ $$kHz$$
4
GATE EE 2009
MCQ (Single Correct Answer)
+2
-0.6
The circuit shows an ideal diode connected to a pure inductor and is connected to a purely sinusoidal $$50$$ $$Hz$$ voltage source. Under ideal condition the current waveform through the indicator will look like GATE EE 2009 Power Electronics - Single and Three Phase Rectifier Question 9 English
A
GATE EE 2009 Power Electronics - Single and Three Phase Rectifier Question 9 English Option 1
B
GATE EE 2009 Power Electronics - Single and Three Phase Rectifier Question 9 English Option 2
C
GATE EE 2009 Power Electronics - Single and Three Phase Rectifier Question 9 English Option 3
D
GATE EE 2009 Power Electronics - Single and Three Phase Rectifier Question 9 English Option 4
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