Top 250+ Solved Electronic Devices and Circuits MCQ Questions Answer
Q. According to Kirchhoffs voltage law, the algebraic sum of all IR drops and e.m.fs. in any closed loop of a network is always
a. negative
b. positive
c. determined by battery e.m.fs.
d. zero
Q. Kirchhoffs current law is applicable to only
a. junction in a network
b. closed loops in a network
c. electric circuits
d. electronic circuits
Q. Kirchhoffs voltage law is related to
a. junction currents
b. battery e.m.fs.
c. ir drops
d. both (b) and (c)
Q. Thevenin resistance Rth is found
a. by removing voltage sources along with their internal resistances
b. by short- circuiting the given two terminals
c. between any two \open\ terminals
d. between same open terminals as for etk
Q. An ideal voltage source should have
a. large value of e.m.f.
b. small value of e.m.f.
c. zero source resistance
d. infinite source resistance
Q. For normal operation of a pnp BJT, the base must be with respect to the emitter and with respect to the collector.
a. positive, negative
b. positive, positive
c. negative, positive
d. negative, negative
Q. A transistor amplifier has a voltage gain of 100. If the input voltage is 75 mV, the output voltage is:
a. 1.33 v
b. 7.5 v
c. 13.3 v
d. 15 v
Q. What is the order of doping, from heavily to lightly doped, for each region?
a. base, collector, emitter
b. emitter, collector, base
c. emitter, base, collector
d. collector, emitter, base
Q. Which of the following is true for an npn or pnp transistor?
a. ie = ib + ic
b. ib = ic+ ie
c. ic = ib + ie
d. none of the above
Q. In what range of voltages is the transistor in the linear region of its operation?
a. 0 < vce
b. 0.7 < vce < vce(max)
c. vce(max) > vce
d. none of the above
Q. What is (are) common fault(s) in a BJT-based circuit?
a. pens or shorts internal to the transistor
b. open bias resistor(s)
c. external opens and shorts on the circuit board
d. all of the above
Q. What is (are) general-purpose/small-signal transistors case type(s)?
a. to-18
b. to-92
c. to-39
d. all of the above
Q. Which of the following devices has the highest input resistance?
a. diode
b. jfet
c. mosfet
d. bipolar junction transistor
Q. A self-biased n-channel JFET has a VD = 6 V. VGS = –3 V. Find the value of VDS.
a. –3 v
b. –6 v
c. 3 v
d. 6 v