Related InterviewSolutions

• What is IC 723?(a) A voltage regulator(b) A full-wave rectifier(c) A half-wave rectifier(d) A clipperI have been asked this question in a job interview.Query is from Voltage Regulators topic in chapter Regulators of Analog Circuits
• For a Zener diode shunt regulator, the source current is IS, the Zener diode current is IZ and the load current is IL. The source voltage is VS, Zener voltage is VZ and load voltage is VL. The load resistance is RL. What is the correct option for the safe operation of the diode?(a) IS = IZ + IL(b) IS =< IZmax + IL(c) IS =< IZmin + IL(d) VL = VZThis question was posed to me in a job interview.The above asked question is from Voltage Regulators topic in portion Regulators of Analog Circuits
• What is line regulation?(a) The process of keeping Zener diode voltage constant inspite of changes in AC supply(b) The process of keeping load voltage constant irrespective of the fluctuation in AC supply or the line voltage(c) The process of keeping load voltage constant irrespective of fluctuation in load current(d) The process of keeping Zener current constant irrespective of fluctuation in AC supplyI had been asked this question by my college professor while I was bunking the class.Question is from Voltage Regulators topic in portion Regulators of Analog Circuits
• Find the power rating of the diode in the given circuit. The breakdown voltage of the diode is 5V.(a) 200 mW(b) 125 mW(c) 250 mW(d) 300 mWThe question was posed to me in class test.This interesting question is from Voltage Regulators topic in chapter Regulators of Analog Circuits
• What is load regulation?(a) The process of keeping the load voltage constant irrespective of any change in AC supply(b) The process of keeping the load voltage constant irrespective of variations in load current(c) The process of keeping load voltage constant irrespective of variations in source current(d) The process of keeping load current constant irrespective of variations in AC supplyThe question was posed to me by my college professor while I was bunking the class.The doubt is from Voltage Regulators topic in section Regulators of Analog Circuits
• In a power supply, the output voltage can vary due to multiple reasons. Which of these is not true if it is found that the output voltage is constant?(a) The voltage stability factor is very high(b) The output resistance is zero(c) The temperature coefficient is zero(d) The voltage stability factor is very smallI got this question by my school principal while I was bunking the class.Question is taken from Voltage Regulators topic in portion Regulators of Analog Circuits
• Which of these is a not drawback of Zener diode shunt regulator?(a) The output voltage is fixed(b) The output voltage can vary with temperature(c) Variation in load current needs to be minimal(d) It is difficult to designI had been asked this question in a national level competition.My enquiry is from Voltage Regulators topic in chapter Regulators of Analog Circuits
• Consider the following circuit. Find the power dissipation of the transistor given that the diode breakdown voltage is 5V, R1=20kΩ, R2=100kΩ, R3=200kΩ, R4=10Ω. The source voltage VS=20V.(a) 12.12W(b) 9.375W(c) 9.27W(d) 10.575WI have been asked this question in a job interview.This key question is from Voltage Regulators in chapter Regulators of Analog Circuits
• The following is a shunt regulator. Find maximum power dissipation of the Zener diode and transistor, given that the source voltage varies from 20-40V, the Zener breakdown voltage is 5V, the output voltage is 10V, the resistance R1=50Ω, R2=20kΩ, β=99, VBE=0.5V.(a) PTransistor = 5.12 W, PZener = 0.051 W(b) PTransistor = 0.41 W, PZener = 0.57 W(c) PTransistor = 5.94 W, PZener = 0.057 W(d) PTransistor = 6.22 W, PZener = 5.66 WThe question was posed to me during an interview for a job.The question is from Voltage Regulators topic in portion Regulators of Analog Circuits
• What is not related to a transistorized series regulator?(a) The output can be varied by using a variable resistor(b) The output is independent of temperature(c) The overload and short circuit protection is not required(d) The circuit has negative feedback responsible for regulationI got this question in an interview for internship.This intriguing question originated from Voltage Regulators in portion Regulators of Analog Circuits