Top 250+ Solved Electronic Devices and Circuits MCQ Questions Answer
Q. In Fourier technique, any periodic distorted waveform can be represented by the fundamental and all harmonic components.
a. multiplying
b. subtracting
c. dividing
d. adding
Q. Improvement in production techniques of power transistors have .
a. produced higher power ratings in small-sized packaging cases
b. increased the maximum transistor breakdown voltage
c. provided faster- switching power transistors
d. all of the above
Q. The greater the power handled by the power transistor, the
a. the higher
b. the lower
c. there is no
d. none of the above
Q. The has the hottest temperature in a power transistor.
a. heat sink
b. case
c. junction
d. none of the above
Q. A heat sink provides thermal resistance between case and air.
a. a high
b. a low
c. the same
d. none of the above
Q. A power amplifier is limited to use at one fixed frequency.
a. class a
b. class b or ab
c. class c
d. class d
Q. By how much does the output signal vary for a class AB power amplifier?
a. 360º
b. 180º
c. between 180º and 360º
d. less than 180º
Q. Which type of amplifier uses pulse (digital) signals in its operation?
a. class a
b. class b or ab
c. class c
d. class d
Q. Which of the power amplifiers has the lowest overall efficiency?
a. class a
b. class b or ab
c. class c
d. class d
Q. Which of the following describe(s) a power amplifier?
a. it can handle large power.
b. it can handle large current.
c. it does not provide much voltage gain.
d. all of the above
Q. amplifiers primarily provide sufficient power to an output load to drive a speaker from a few watts to tens of watts.
a. small-signal
b. power
c. none of the above
d. all of the above
Q. The main features of a large-signal amplifier is the circuit's .
a. power efficiency
b. maximum power limitations
c. impedance matching to the output device
d. all of the above
Q. The Norton current is sometimes called the
a. shorted-load current
b. open-load current
c. thevenin current
d. thevenin voltage
Q. Kirchhoff s current law states that
a. net current flow at the junction is positive
b. hebraic sum of the currents meeting at the junction is zero
c. no current can leave the junction without some current entering it.
d. total sum of currents meeting at the junction is zero