Top 250+ Solved Electronic Devices and Circuits MCQ Questions Answer
Q. In an npn transistor, the majority carriers in the emitter are
a. free electrons
b. holes
c. neither
d. both
Q. The base of an npn transistor is thin and
a. heavily doped
b. lightly doped
c. metallic
d. doped by a pentavalent material
Q. The emitter of a transistor is generally doped the heaviest because it
a. has to dissipate maximum power
b. has to supply the charge carriers
c. is the first region of the transistor
d. must possess low resistance
Q. When a transistor is fully switched ON, it is said to be
a. shorted
b. saturated
c. open
d. cut-off
Q. The extremely high input impedance of a MOSFET is primarily due to the
a. absence of its channel
b. negative gate- source voltage
c. depletion of current carriers
d. extremely small leakage current of its gate capacitor
Q. When a transistor is used as a switch, it is stable in which two distinct regions?
a. saturation and active
b. active and cutoff
c. saturation and cutoff
d. none of the above
Q. The term BJT is short for
a. base junction transistor
b. binary junction transistor
c. both junction transistor
d. bipolar junction transistor
Q. What are the two types of bipolar junction transistors?
a. npn and pnp
b. pnn and nnp
c. ppn and nnp
d. pts and stp
Q. The magnitude of dark current in a phototransistor usually falls in what range?
a. ma
b. ma
c. na
d. pa
Q. When not in use, MOSFET pins are kept at the same potential through the use of:
a. shipping foil
b. nonconductive foam
c. conductive foam
d. a wrist strap