Top 250+ Solved Electronic Devices and Circuits MCQ Questions Answer
Q. A star circuit has element of resistance R/2. The equivalent delta elements will be
a. r/6
b. fi?
c. 2r
d. 4r
Q. A delta circuit has each element of value R/2. The equivalent elements of star circuit with be
a. rig
b. r/3
c. 2r
d. 3r
Q. While calculating Rth in Thevenin's theorem and Norton equivalent
a. all independent sources are made dead
b. only current sources are made dead
c. only voltage sources are made dead
d. all voltage and current sources are made dead
Q. The number of independent equations to solve a network is equal to
a. the number of chords
b. the number of branches
c. sum of the number of branches and chords
d. sum of number of branches, chords and nodes
Q. The superposition theorem requires as many circuits to be solved as there are
a. sources, nodes and meshes
b. sources and nodes
c. sources
d. nodes
Q. Which of the following is a concern when using CMOS type devices?
a. mechanical shock
b. electrostatic discharge
c. fan out
d. under voltage
Q. Which of the following is not a solution to interface problems between CMOS and TTL?
a. pull-up resistor
b. pull-down resistor
c. level-shifter
d. buffer
Q. The output current for a LOW output is called a(n)
a. exit current.
b. sink current.
c. ground current.
d. fan-out.
Q. A family of logic devices designed for extremely high speed applications is called
a. nmos.
b. ecl.
c. pmos.
d. ttl.
Q. Unused inputs on TTL, AND, and NAND gates
a. degrade the gate\s noise immunity.
b. if left open will have the same effect as high inputs.
c. should be tied high.
d. all of the above are correct.
Q. The lower transistor of a totem-pole output is OFF when the gate output is
a. high.
b. malfunctioning.
c. low.
d. over driven.
Q. The input transistor on a TTL circuit is unusual in that it has
a. multiple bases.
b. no collector.
c. no base.
d. multiple emitters.
Q. The difference between VOH and VIH voltages is known as
a. input margin.
b. noise margin.
c. output differential.
d. input level.
Q. The upper transistor of a totem-pole output is OFF when the gate output is
a. logic 1.
b. malfunctioning.
c. high.
d. low.