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1

GATE EE 1998

MCQ (Single Correct Answer)
In a commutation circuit employed to turn off an $$SCR$$, Satisfactory turn-off is obtained when.
A
Circuit turn-off time
< device turn-off time
B
Circuit turn-off time
> device turn-off time
C
Circuit time constant
> device turn-off time
D
Circuit time constant
< device turn-off time
2

GATE EE 1998

MCQ (Single Correct Answer)
The uncontrolled electronic switch employed in power electronic converters is
A
thyristor
B
bipolar junction transistor
C
Diode
D
MOSFET
3

GATE EE 1998

MCQ (Single Correct Answer)
The $$MOSFET$$ switch in its on - state may be considered equivalent to
A
Resistor
B
Inductor
C
Capacitor
D
Battery
4

GATE EE 1997

MCQ (Single Correct Answer)
If a diode is connected in anti - parallel with a thyristor, then
A
Both turn off power loss and turn off time decreases
B
Turn-off power loss decreases but turn - off -time increases
C
Turn-off power loss increases, but turn off time decreases
D
None of the above

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