A Best Way To Crack Gorenment Job Exams

ECE Objective Questions { FET and FET Amplifiers }



22.  In a JFET operating above pinch-off voltage, the
A. drain current increases steeply
B. drain current remains practically constant
C. drain current starts decreasing
D. depletion regions become smaller

23. The main factor which differentiates a DE MOSFET from an E-onty MOSFET is the absence of
A. insulated gate
B. electrons
C. channel
D. P-N junctions

24. The polarity of VGs for E-only MOSFET is
A. positive
B. negative
C. zero
D. depends on P or N-channel

25. A diac is equivalent to a
A. pair of SCRs
B. pair of four-layer SCRs
C. diode and two resistors
D. triac with two gates

26. A UJT has RBB = 10 K and RB2 = 4K. Its intrinsic stand-off ratio is
A.0.6
B.0.4
C.2.5
D.513

27. Regarding triac which statement is false?
A. it is a 5-layer bi-directional semiconductor device
B. it can be triggered in response to both positive and negative gate signals
C. it is not particularly suited for AC or mains power control
D. any one of its main terminals can be used either as cathode or as anode

28. The best electronic device for fast switching is
A. BJT
B. triode
C. JFET
D. MOSFET

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