Top 250+ Solved Electronic Devices and Circuits MCQ Questions Answer
Q. A JFET data sheet specifies VGS(off) = –6 V and IDSS = 8 mA. Find the value of ID when VGS = –3 V.
a. 2 ma
b. 4 ma
c. 8 ma
d. none of the above
Q. A JFET data sheet specifies VGS(off) = –10 V and IDSS = 8 mA. Find the value of ID when VGS = –3 V.
a. 2 ma
b. 1.4 ma
c. 4.8 ma
d. 3.92 ma
Q. The JFET is always operated with the gate-source pn junction -biased.
a. forward
b. reverse
c. all of the above
d. none of the above
Q. What type(s) of gate-to-source voltage(s) can a depletion MOSFET (D-MOSFET) operate with?
a. zero
b. positive
c. negative
d. any of the above
Q. The has a physical channel between the drain and source.
a. d-mosfet
b. e-mosfet
c. v-mosfet
d. none of the above
Q. A common-source amplifier is similar in configuration to which BJT amplifier?
a. common-base
b. common- collector
c. common-emitter
d. emitter- follower
Q. When transistors are used in digital circuits they usually operate in the
a. active region
b. breakdown region
c. saturation and cutoff regions
d. linear region
Q. Which of the following elements are important in determining the gain of the system in the high-frequency region?
a. interelectrode capacitances
b. wiring capacitances
c. miller effect capacitance
d. all of the above
Q. For audio systems, the reference level is generally accepted as .
a. 1 mw
b. 1 w
c. 10 mw
d. 100 mw
Q. What is the normalized gain expressed in dB for the cutoff frequencies?
a. –3 db
b. +3 db
c. –6 db
d. –20 db
Q. Which of the following configurations does not involve the Miller effect capacitance?
a. common-emitter
b. common-base
c. common- collector
d. all of the above
Q. When transistors are used in digital circuits they usually operate in the
a. active region
b. saturation and cutoff regions
c. breakdown region
d. linear region
Q. A current ratio of IC/IE is usually less than one and is called
a. omega
b. beta
c. theta
d. alpha
Q. A transistor may be used as a switching device or as a:
a. tuning device
b. rectifier
c. fixed resistor
d. variable resistor
Q. Most of the electrons in the base of an NPN transistor flow:
a. into the collector
b. into the emitter
c. out of the base lead
d. into the base supply