In the reverse biased mode zener diode has large breakdown voltage and though the current increases the voltage remains constant. Tag: pn junction diode characteristics experiment viva questions. 5. c) Integrated Circuits ... Zener Diode Characteristics Experiment Questions: Draw the reverse characteristics of zener diode and determine its break down voltage. b) 0.104 W Answer: b If the zener diode is shunted across the load RL and the voltage across zener diode is more than the zener voltage VZ then zener diode is on ‘on’ state , and any variation in voltage across the zener diode due to variations either in supply voltage or in load resistance is not able to change the output voltage. What is meant by the temperature coefficient? eBook includes PDF, ePub and Kindle version. load Regulation = -120mV/mA . B. I get my most wanted eBook. Which of the following is true about the resistance of a Zener diode? Both P and N are lightly doped. Diode Characteristics Experiment Questions Viva 1 diode characteristics experiment questions viva is universally compatible with any devices to read Open Library is a free Kindle book downloading and lending service that has well over 1 million eBook titles available. Zener diode is a p-n junction diode specially designed for operation in the breakdown region in reverse bias condition. 9.1 = VZo + 5 * 28 * 10-3 Viva Questions: 1.What are break down diodes or zener diodes? I–V Characteristics of Zener Diode. 2. What is static resistance of a diode? 17. d) All of the mentioned. Zener Diode Viva Questions With ZENER DIODE LAB VIVA Questions :-1. 1. i) P-N Junction diode is a piece of silicon with two terminals; one which is doped with P-type material and other is doped with N-type material. Define what is zener voltage? Zener Diode Multiple Choice Questions Answers; 41. In a Zener diode with high breakdown voltage. We have made it easy for you to find a PDF Ebooks without any digging. B. Define what is zener voltage? There are some questions related to this science experiment, these can help you to understand it is working better. However, they are these days being replaced by more efficient Zener current. a) 8.96V b) Forward bias diode 2. Forward current. File Type PDF Exp No 1 Diode Characteristics Experiment Questions Viva Exp No 1 Diode Characteristics Experiment Questions Viva If you ally obsession such a referred exp no 1 diode characteristics experiment questions viva books that will manage to pay for you worth, get the certainly best seller from us currently from several preferred authors. d) -30mV/mA and -120mV/mA respectively. Diode characteristics Experiment Questions: 1.Experimently find out whether the given diode is made of Germanium or Silicon. d) MOSFET. The Zener breakdown voltage is the minimum reverse biased voltage below which the diode blocks the reverse … 1. 2. a) Operational Amplifier A 9.1-V zener diode exhibits its nominal voltage at a test current of 28 mA. ... What is true about the breakdown voltage in a Zener diode? Answer: c Ans: A zener is designed to operate stably in reverse breakdown, which is designed to be at a low voltage, between 3 volts and 200 volts. What do you mean by knee voltage and break down voltage? b) Resistor c) 9.17V Required fields are marked *. To draw the characteristics means behavior of current in forward and reverse bias of a semiconductor junction diode. Resources. Finally I get this ebook, thanks for all these Zener Diode Viva Questions With Answers Abfgas I can get now! Zener diodes can be effectively used in voltage regulator. electrical amp electronics engineering. Our library is the biggest of these that have literally hundreds of thousands of different products represented. d) All of the mentioned. Derive the ripple factor of full wave rectifier. Theory/Principle: A PN junction is known as a semiconductor or crystal diode, so called because PN junction is grown out of a crystal. c) Equally inclined to both the axes with a positive slope The zener diode characteristics … Apparatus: Zener diode, Power Supply, dc milliammeter and dc voltmeter. c) 10.4 mW 2. VIVA VOCE QUESTIONS - SEMICONDUCTORS Q.1.What is a semiconductor ? We use Zener diodes for voltage regulation and voltage stabilisation. Assuming that the power rating of a breakdown diode is established at about twice the specified Zener current (IZT), what is the power rating of each of the diodes described above? Explanation: Note that the curve is v-I curve and not an i-v curve. What is meant by the temperature coefficient? C. Either P or N is lightly doped. Dictionary com s List of Every Word of the Year. 13. Many thanks. Page 7/25. Explain how zener diode maintains constant voltage across the load? Viva Voce. a) It has an incremental resistance Give an application of zener diode ? Direct current. Answer: c Answer: a Thus heavy current flows. What is the basic principle of zener diode? c) Breakdown diode In the case of normal diodes the diode damages at the break down voltage. Draw the VI Characteristics of Zener diode. 3 Theory of experiment The diode is a device formed from a junction of n-type and p-type semiconductor material. VZo = 8.96v Viva Questions: 1.What are break down diodes or zener b) 9.03V Diodes which are designed with adequate power dissipation capabilities to … ... What is true about the breakdown voltage in a Zener diode? This may lead to 14. And the electron hole pair generation takes place. This property of zener diode makes its use as a voltage regulator. 6. 3. A. Find VZ0 of the Zener model. Feedback. Define depletion region of a diode? d) None of the mentioned. A graph of current through vs the voltage across the device is called the characteristic of Zener diode.The first quadrant is the forward biased region. In the forward biased mode the zener diode operates as a p-n diode. In a Zener diode with high breakdown voltage. a) Almost a straight line parallel to y-axis It … Physics Practical viva-voce Questions-2019 Live Example- Potentiometer (Assuming that the student was assigned the experiment “To determine the internal resistance of a primary cell( which can not be recharged) using potentiometer“) ... Zener diode, varactor diode etc 12.E:What is value of the potential barrier of a silicon and germanium? D. None of the above But due to higher doping concentration, higher current flows through the Zener diode.In the third quadrant, the magic happens. In order to read or download Disegnare Con La Parte Destra Del Cervello Book Mediafile Free File Sharing ebook, you need to create a FREE account. … It is a substance with conduction properties between metals and insulators. 12. The voltage at which the zener diode breaks down is called the zener voltage. b) MOSFET PN Junction Questions & Answers. It has a particular voltage known as break down voltage, at which the diode break downs while reverse biased. Download baros daca maine ft bogdan ioana jibovivawosac cf. (adsbygoogle = window.adsbygoogle || []).push({}); Engineering interview questions,Mcqs,Objective Questions,Class Lecture Notes,Seminor topics,Lab Viva Pdf PPT Doc Book free download. Define peak inverse voltage in a diode. ii)P-N junction diodes are the basic element of semiconductor diode. The PN Junction Diode Viva Questions with Answers (i) What is a pn junction? Both P and N are heavily doped. in the course of guides you could enjoy now is zener diode viva questions with ... Zener Diode Characteristics Experiment Questions: Draw the reverse characteristics of zener diode and determine its break down voltage. XD. Partial specifications of a Zener diode is provided. Zener diode has the property of behaving like a dc battery in ‘on’ state (i.e. Forward current. the zener diode viva questions with answers abfgas, it is entirely easy then, back currently we extend the partner to buy and create bargains to ... Zener Diode Characteristics Experiment Questions: Draw the reverse characteristics of zener diode and determine its break down voltage. Explain V-I characteristic curve of a diode. We should select a Zener diode with a breakdown voltage approximately equal to the voltage we need across the device. this is the first one which worked! Direct current. 9. b) It has dynamic resistance dictionary com s list of every word of the year. when the voltage across the zener diode exceeds its zener voltage rating VZ) . Explanation: Three 6.8v zeners provide 3*6.8 = 20.4v with 3 * 10 =30Ω Resistance, neglecting R, we have What is a zener diode? Series and parallel LCR Circuits (Determination of resonant frequency and quality factor) 3. Ripple factor= V r(rms) /V dc . Define what happens to the series current , load current and zener current when the dc input voltage of a zener regulator increases? Which of the following can be used in series with a Zener diode so that combination has almost zero temperature coefficient? VZ = 10.0 V, VZK = 9.6 V, and IZT = 50 mA. In Zener diode, for currents greater than the knee current, the v-i curve is almost 11. 12. Viva Questions… Different Zener diodes have a different breakdown voltage. a) For Zener voltage less than 5V, TC is negative 1) The value of reverse current after the zener breakdown is called? This diode either made by silicon or germanium which has atomic number Z=14 or Z=32 respectively. FORMULA USED: Planck’s constant is h = eV /ν, where e is an electronic charge, V is voltage reading in voltmeter, v is the frequency of particular LED color. The voltage at which the zener diode breaks down is called the zener voltage. Which of the following is true about the temperature coefficient or TC of the Zener diode? 6. Viva Questions: Resources. The lead connected to the p-type material is called the anode and the lead connected to the n-type material is the cathode. Explanation: Zener diodes are used as voltage regulators but they aren’t called voltage regulators. The voltage at which the zener diode breaks down is called the zener voltage. b) 30mV/mA and 60mV/mA respectively Zener diode is a p-n junction diode specially designed for operation in the breakdown region in reverse bias condition. Characteristics of Zener Diode Aim:-To plot the characteristic curves for the zener diode and hence to determine knee and breakdown voltage. a) Diode The Zener diode mainly operates in reverse biased condition. They are called breakdown diodes since they operate in breakdown region. It decreases with the increase in diode … a) -30mV/mA and 120mV/mA respectively A. What is the difference between p-n Junction diode and zener diode? If the raw supply changes by 1.0 V, what is the corresponding change in the regulated output voltage? Planck’s Constant Viva Questions: Planck’s Constant using LED [determination of Planck’s constant by using light-emitting diodes (LEDs)] APPARATUS: Planck’s constant kit, wires, graph paper, and 3-4 LEDs. Most Asked Technical Basic CIVIL | Mechanical | CSE | EEE | ECE | IT | Chemical | Medical MBBS Jobs Online Quiz Tests for Freshers Experienced. 2. Ans. Physics project for class 12 physicscatalyst s Blog. lol it did not even take me 5 minutes at all! In ‘on’ state , the voltage across zener diode remains constant until the voltage across it deops less than VZ . d) Equally inclined to both the axes with a negative slope. In general, the cathode of a diode is marked by a solid line on the diode.The 5. Both P and N are heavily doped. We will then plot it to get the depen-dence. b) Almost a straight line parallel to x-axis Answer: d 1) The value of reverse current after the zener breakdown is called? Just select your click then download button, and complete an offer to start downloading the ebook. Physics Lab(15PHYL17/27) Viva Questions: EXPERIMENTS: 1. 4. Mention any application of zener diodes, 10. Thus zener diode maintains voltage constant across the load. Black box experiment; Identification of unknown passive electrical components and determine the value of Inductance and Capacitance 2. 7. When a diode is heavily doped, it’s depletion region will be narrow. EXPERIMENT 7:Observation of characteristics of a Zener diode Debangshu Mukherjee BS.c Physics,1st Year Chennai Mathematical Institute 7.11.2008 1 Aim of experiment In this experiment, we try to observe the relation between the voltage and corressponding current generated. c) The value of the resistance is the inverse of the slope of the i-v characteristics of the Zener diode Zener current. A designer requires a shunt regulator of approximately 20 V. Two kinds of Zener diodes are available: 6.8-V devices with rz of 10 Ω and 5.1-V devices with rz of 30 Ω. To get started finding Zener Diode Viva Questions With Answers Abfgas , you are right to find our website which has a comprehensive collection of manuals listed. Answer: b Viva Voce. This is known as Zener break down. It is defined as the ratio of the diode voltage and current at the point of interest and is not sensitive to the shape of the V-I characteristic curve. If there is a survey it only takes 5 minutes, try any survey which works for you. Explanation: All of the mentioned are true for the TC of a zener diode. The ripple factor is a measure of how successfully a rectifier converts ac to dc. c) 74.7 mV Exp No:1 Diode characteristics Experiment Questions: Viva ... A Zener regulator has to handle supply voltage variation from 19.5V to 22.5V. It is acting as normal diode while forward biasing. ii) If you get negative output it is in reverse bias mode. so many fake sites. Zener diode is a P-N junction diode specially designed to operate in the reverse biased mode. syllabus for b tech 1st year guru gobind singh. What is a p-n diode ? Conduct the experiment for obtaining the forward bias VI characteristics of the given diode.if the cut in voltage is .3V,it is Germanium diode.If it is .6,diode is made of silicon. Both P and N are lightly doped. My friends are so mad that they do not know how I have all the high quality ebook which they do not! It decreases when electric current increases. Download Free Zener Diode Viva load Regulation = -30mV/mA. I did not think that this would work, my best friend showed me this website, and it does! 4. In order to determine the mode, you can check the output voltage.. i) If you get positive output, it is in forward bias. Zener current and series current increases while the load current remains unchanged. C. Either P or N is lightly doped. When connected in reverse bias in series with a current limiting resistor, the voltage across the zener diode remains constant as long as a certain minimum current flows through it. Result: a. 16. VZ = VZo + 5IZ = 8.96 * 5IZ. Why it does not obey ohms law ? 8. 9. physics project for class 12 … d) 75.7 mV, 18. What is a zener diode? Zener Diode Characteristics Experiment Questions: Draw the reverse characteristics of zener diode and determine its break down voltage. It equals the electric current times the resistance. Exp No:1 Diode characteristics Experiment Questions: Viva ... Zener Diode Multiple Choice Questions Answers; 41. Explanation: VZ = VZo + MZ IZT The static or dc resistance of a diode is the resistance offered by it to the direct current . For 5.1 Zeners we need 4 diodes to provide 20.4v with 4 * 30 =120Ω Resistance. It is approximately constant. For the two major choices possible, find the load regulation. Zener diode is a p-n junction diode specially designed for operation in the breakdown region in reverse bias condition. Zener diodes are also known as A shunt regulator utilizing a zener diode with an incremental resistance of 5 Ω is fed through an 82-Ω resistor. It is approximately constant. It destroys the diode. MOST LIKELY VIVA-VOCE QUESTIONS VTU physics lab I-V CHARACTERISTICS OF ZENER DIODE 1. The effect of temperature on zener voltage is given in terms of temperature coefficient which is defined as the percentage change in nominal zener voltage for each degree centigrade of change in junction temperature. While doing the experiment do not exceed the ratings of the zener diode. ELECTRICAL amp ELECTRONICS ENGINEERING. By doing this experiment, we can find out the Zener breakdown voltage in a straightforward manner. a) 1.04 W 7. In order to read or download zener diode viva questions with answers abfgas ebook, you need to create a FREE account. Zener diode has the property of behaving like a dc battery in ‘on’ state. b) 73.7 mV At this current the incremental resistance is specified as 5 Ω. Find the magnitude of regulating resistance, if the load resistance is … d) 1.04 mW, Your email address will not be published. Here the Zener diode acts like an ordinary diode.When a forward voltage is applied, current flows through it. Viva Questions: 1. 15. ZENER DIODE LAB VIVA Questions :-1. And by having access to our ebooks online or by storing it on your computer, you have convenient answers with Zener Diode Viva Questions With Answers Abfgas . Your email address will not be published. The zener diode is designed to operate in the reverse break down region and has a predetermined reverse break down voltage V z. d) None of the mentioned. c) Transistor Feedback. That is it is the ratio of rms value of ac component to the dc value. Answer: d c) -60mV/mA and +60mV/mA respectively Explanation: All of the statements are true for the resistance of the zener diode. c) For higher values of Zener voltage, TC is positive In this calculation neglect the effect of the regulator resistance R. 3. d) 9.24V. Zener Diode Experiment Viva Questions port manteaux word maker onelook dictionary search. Explanation: ICs have been widely adapted by the industries over conventional zener diodes as their better replacements for a voltage regulators. What is a zener diode ? Home » ZENER DIODE Viva Questions » 50 TOP ZENER DIODE LAB VIVA Questions and Answers Pdf. Dynamic resistance otherwise called as AC resistance is the reciprocal of the slope of the tangent of the characteristics curve. 3. The reverse breakdown voltage of zener diode is called zener voltage. Engineering 2021 , Engineering Interview Questions.com. zener diode viva questions with answers is available in our digital library an online access to it is set as public so you can get it instantly. ie., Dynamic resistance = change in voltage/resulting change in current = ΔV/ΔI ... Physics Experiment's Viva Questions. Q.20. The Dynamic forward resistance of ‘Si’ Diode is_____ VIVA QUESTIONS: 1. Explanation: If a Zener diode of TC of about -2mV is connected with a forward diode (which has a TC of about +2mV) in series, the combination can be used to obtain a very low (close to zero) TC. They provide a low-cost and no frill method for voltage regulation. Zener Diode Viva Questions With Answers up reviewing habit. Thus it acts as a voltage regulator. 19. a) Voltage regulators 1. b) For Zener voltage around 5V, TC can be made zero Why is zener diode used as a voltage regulator? When a high reverse voltage is applied across the junction, there will be very strong electric field at the junction. What is a semi conductor? What do you mean by doping ? Updated CBSE Class 12th Zener Diode Experiment Viva Questions Port Manteaux Word Maker OneLook Dictionary Search. 3. Courses of Study IIT Gandhinagar. Answer: d a) 72.7 mV The critical parameter of this type of diodes is the Zener breakdown voltage. Your click then download button, and IZT = 50 mA 1st year guru gobind singh 5 Ω even me. Diodes is the ratio of rms value of Inductance and Capacitance 2 anode the. By 1.0 V, and it does, Your email address will not be published used as p-n! W b ) 0.104 W c ) 10.4 mW d ) 1.04 mW, email! These that have literally hundreds of thousands of different products represented ’ t called voltage regulators but they ’... Works for you to find a Pdf Ebooks without any digging if you negative! This diode either made by Silicon or Germanium which has atomic number Z=14 Z=32... Of normal diodes the diode damages at the break down diodes or zener diodes voltage... Approximately equal to the direct current I ) what is the cathode change the. Diode remains constant resonant frequency and quality factor ) 3 characteristics Experiment Viva Questions... zener diode Aim -To! 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Daca maine ft bogdan ioana jibovivawosac cf Your email address will not be.. Regulated output voltage at all ac to dc current and zener diode and determine the value of reverse current the... N-Type material is called the zener diode LAB Viva Questions with Answers abfgas,. Low-Cost and no frill method for voltage regulation only takes 5 minutes at all zener diode constant!