Related InterviewSolutions

• Gain of an amplifier usually expressed in db because _______________(a) It is a small unit(b) Calculations become easy(c) Human ear response is logarithmic(d) Gain is reducedI had been asked this question in exam.Origin of the question is Multistage Amplifier topic in section Differential and Multistage Amplifiers of Electronic Devices & Circuits
• Calculate the efficiency of a class B amplifier for a supply voltage of VCC = 20 V with peak output voltage of VL(p) = 18 V. Assume RL = 16 .(a) 78.54%(b) 75%(c) 70.69%(d) 50%This question was addressed to me during an online exam.Question is taken from Classification of Output Stages in chapter Differential and Multistage Amplifiers of Electronic Devices & Circuits
• _______are usually utilized to extract heat from a variety of heat generating bodies to a heat sink.(a) square fins(b) cylindrical fins(c) cavities(d) no optionThis question was addressed to me in an internship interview.The question is from Transistor Case and Heat Sinks in division Differential and Multistage Amplifiers of Electronic Devices & Circuits
• How can one decrease the spreading resistance in the base of the heat sink?(a) Increase the base thickness.(b) Decrease the base thickness.(c) Choosing a material with less conductivity.(d) There is no possible way.This question was addressed to me during an online interview.My question is based upon Transistor Case and Heat Sinks in section Differential and Multistage Amplifiers of Electronic Devices & Circuits
• A class A power amplifier is sometimes called ____________ amplifier(a) Reciprocating(b) Single – ended(c) Symmetrical(d) DifferentialThis question was posed to me by my school principal while I was bunking the class.Origin of the question is Class A Output Stage in chapter Differential and Multistage Amplifiers of Electronic Devices & Circuits
• A class A power amplifier uses ______________(a) Two transistors(b) One transistor(c) Three transistors(d) Four transistorsThe question was posed to me in a job interview.The above asked question is from Class A Output Stage topic in section Differential and Multistage Amplifiers of Electronic Devices & Circuits
• Two non-inverting amplifiers, with gain =1 and gain=20 are made using identical operational amplifiers. As compared to the unity gain amplifier, the amplifier with gain=20 has ___________(a) More input impedance(b) Less negative feedback(c) Less Bandwidth(d) Less input impedanceThe question was asked by my school teacher while I was bunking the class.The origin of the question is Properties of Negative Feedback topic in chapter Differential and Multistage Amplifiers of Electronic Devices & Circuits
• An ideal OP-Amp Is an ideal ______________(a) Current controlled current source(b) Current controlled voltage source(c) Voltage controlled voltage source(d) Voltage controlled Current sourceThis question was posed to me in class test.This intriguing question originated from Properties of Negative Feedback in division Differential and Multistage Amplifiers of Electronic Devices & Circuits
• Which of the following characteristics makes passive heat sinks differently from active heat sinks?(a) It possess mechanical components(b) It possess electrical components(c) Does not possess mechanical components(d) It possess electrical & mechanical componentsThis question was posed to me during an interview.I want to ask this question from Transistor Case and Heat Sinks in chapter Differential and Multistage Amplifiers of Electronic Devices & Circuits
• Copper has around twice the thermal conductivity of aluminum.(a) True(b) FalseI had been asked this question in homework.The above asked question is from Transistor Case and Heat Sinks topic in section Differential and Multistage Amplifiers of Electronic Devices & Circuits