ONLINE MCQ EE AND ECE-POWER ELECTRONICS PART 11

[1] Which of the following statements are correct?

1. Thyristor is current driven device
2. GTO is current driven device
3. GTR is current driven device
4. SCR is a pulse triggered device

(a) 1 and 2
(b)1, 2, 3
(c) All
(d) 4 only

Answer

[2] Which of the following statements are correct?

1.  GTO is a pulse triggered device

2.  MOSFET is uni-polar device

3.  SCR is a bipolar device

4.  Continuous gate signal is not required to maintain the SCR to be in ON state

(a)  1, 2, 4 only

(b)  1, 2 only
(c)  4 only
(d)  All

Answer

[3] Which of the following is not a fully controlled semiconductor device?

(a) MOSFET
(b) IGBT
(c) IGCT
(d) SCR

Answer

[4] Which of the following is not associated with p-n junction

(a) Junction capacitance
(b) Charge storage capacitance
(c) Depletion capacitance
(d) Channel length modulation

Answer

[5] In a p-n junction diode under reverse bias, the magnitude of electric field is maximum at

(a) The edge of the depletion region on the P-side
(b) The edge of the depletion region on the N-side
(c) The P-N junction
(d) The center of the depletion region on the N-side

Answer

[6] An n-channel JFET has IDSS=2mA, and Vp=-4V. Its transconductance
gm=(in mA/V) for an applied gate to source voltage VGS=-2V is

(a) 0.25
(b) 0.5
(c) 0.75
(d)  1

Answer

[7] The MOSFET switch in its on-state may be considered equivalent to

(a) Resistor
(b) Inductor
(c) Capacitor
(d) Battery

Answer

[8] The effective channel length of a MOSFET in a saturation decreases with increase in
(a) Gate voltage
(b) Drain voltage
(c) Source voltage
(d) Body voltage

Answer

[9] The early effect in a bipolar junction transistor is caused by
(a) Fast turn – on
(b) Fast turn – off
(c) Large collector – base reverse bias
(d) Large emmiter – base forward bias

Answer

[10] MOSFET can be used as a
(a) Current controlled capacitor
(b) Voltage controlled capacitor
(c) Current controlled inductor
(d) Voltage controlled inductors

Answer

[11] The number of PN junctions in a SCR is
(a) 1
(b) 2
(c) 3
(d) 4

Answer

[12] In the SCR, when the anode terminal is positive with respect to cathode terminal, the number of blocked PN junctions is
(a) 1
(b) 2
(c) 3
(d) 4

Answer

[13] In the SCR, when the cathode terminal is positive with respect to anode terminal, the number of blocked PN junctions is
(a) 1
(b) 2
(c) 3
(d) 4

Answer

[14] In the SCR, the anode current is made up of
(a) Electrons only
(b) Electrons or holes
(c) Electrons and holes
(d) Holes only

Answer

[15] When the SCR is triggered, it will change from forward blocking
state to conduction state if its anode to cathode voltage is equal
to 
(a) Peak repetitive off-state forward voltage
(b) Peak working off-state forward voltage
(c) Peak working off-state reverse voltage
(d) Peak non-repetitive off-state forward voltage

Answer

ONLINE MCQ EE AND ECE-POWER ELECTRONICS PART 12
ONLINE MCQ EE AND ECE-POWER ELECTRONICS PART 10

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