Which of the following is true about the temperature coefficient or TC of the Zener diode? Zener diode is a p-n junction diode specially designed for operation in the breakdown region in reverse bias condition. We have made it easy for you to find a PDF Ebooks without any digging. lol it did not even take me 5 minutes at all! We use Zener diodes for voltage regulation and voltage stabilisation. C. Either P or N is lightly doped. a) For Zener voltage less than 5V, TC is negative The zener diode is designed to operate in the reverse break down region and has a predetermined reverse break down voltage V z. Explanation: ICs have been widely adapted by the industries over conventional zener diodes as their better replacements for a voltage regulators. ... What is true about the breakdown voltage in a Zener diode? Thus zener diode maintains voltage constant across the load. The critical parameter of this type of diodes is the Zener breakdown voltage. 3. For 5.1 Zeners we need 4 diodes to provide 20.4v with 4 * 30 =120Ω Resistance. A. 16. Apparatus: Zener diode, Power Supply, dc milliammeter and dc voltmeter. A 9.1-V zener diode exhibits its nominal voltage at a test current of 28 mA. Result: a. Both P and N are heavily doped. What do you mean by doping ? d) -30mV/mA and -120mV/mA respectively. a) 72.7 mV Series and parallel LCR Circuits (Determination of resonant frequency and quality factor) 3. Answer: b However, they are these days being replaced by more efficient 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? 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 . Ripple factor= V r(rms) /V dc . They are called breakdown diodes since they operate in breakdown region. 2. Home » ZENER DIODE Viva Questions » 50 TOP ZENER DIODE LAB VIVA Questions and Answers Pdf. 17. XD. The lead connected to the p-type material is called the anode and the lead connected to the n-type material is the cathode. What is a zener diode? a) 1.04 W 2. 3. Download Free Zener Diode Viva Both P and N are lightly doped. What is the difference between p-n Junction diode and zener diode? load Regulation = -30mV/mA. This property of zener diode makes its use as a voltage regulator. Zener diode is a p-n junction diode specially designed for operation in the breakdown region in reverse bias condition. 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. But due to higher doping concentration, higher current flows through the Zener diode.In the third quadrant, the magic happens. Viva Voce. Zener diode has the property of behaving like a dc battery in ‘on’ state. b) Almost a straight line parallel to x-axis b) 0.104 W dictionary com s list of every word of the year. In Zener diode, for currents greater than the knee current, the v-i curve is almost Required fields are marked *. Explanation: All of the mentioned are true for the TC of a zener diode. 12. Define depletion region of a diode? Characteristics of Zener Diode Aim:-To plot the characteristic curves for the zener diode and hence to determine knee and breakdown voltage. In the reverse biased mode zener diode has large breakdown voltage and though the current increases the voltage remains constant. Draw the VI Characteristics of Zener diode. What is meant by the temperature coefficient? c) For higher values of Zener voltage, TC is positive Dynamic resistance otherwise called as AC resistance is the reciprocal of the slope of the tangent of the characteristics curve. Black box experiment; Identification of unknown passive electrical components and determine the value of Inductance and Capacitance 2. And the electron hole pair generation takes place. For the two major choices possible, find the load regulation. VZo = 8.96v In this calculation neglect the effect of the regulator resistance R. 7. At this current the incremental resistance is specified as 5 Ω. 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. d) None of the mentioned. Physics project for class 12 physicscatalyst s Blog. Most Asked Technical Basic CIVIL | Mechanical | CSE | EEE | ECE | IT | Chemical | Medical MBBS Jobs Online Quiz Tests for Freshers Experienced. What is static resistance of a diode? Updated CBSE Class 12th In the forward biased mode the zener diode operates as a p-n diode. This diode either made by silicon or germanium which has atomic number Z=14 or Z=32 respectively. Theory/Principle: A PN junction is known as a semiconductor or crystal diode, so called because PN junction is grown out of a crystal. 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. 6. 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. Resources. Explanation: Three 6.8v zeners provide 3*6.8 = 20.4v with 3 * 10 =30Ω Resistance, neglecting R, we have d) All of the mentioned. Exp No:1 Diode characteristics Experiment Questions: Viva ... A Zener regulator has to handle supply voltage variation from 19.5V to 22.5V. Why is zener diode used as a voltage regulator? c) Integrated Circuits VZ = 10.0 V, VZK = 9.6 V, and IZT = 50 mA. 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. 14. My friends are so mad that they do not know how I have all the high quality ebook which they do not! Exp No:1 Diode characteristics Experiment Questions: Viva ... Zener Diode Multiple Choice Questions Answers; 41. a) 8.96V I–V Characteristics of Zener Diode. 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. Just select your click then download button, and complete an offer to start downloading the ebook. c) -60mV/mA and +60mV/mA respectively The PN Junction Diode Viva Questions with Answers (i) What is a pn junction? Explanation: All of the statements are true for the resistance of the zener diode. a) It has an incremental resistance Zener current. 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. Q.20. This is known as Zener break down. C. Either P or N is lightly doped. When a high reverse voltage is applied across the junction, there will be very strong electric field at the junction. The voltage at which the zener diode breaks down is called the zener voltage. 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. c) 10.4 mW What is a p-n diode ? A shunt regulator utilizing a zener diode with an incremental resistance of 5 Ω is fed through an 82-Ω resistor. The voltage at which the zener diode breaks down is called the zener voltage. We will then plot it to get the depen-dence. Give an application of zener diode ? Diode characteristics Experiment Questions: 1.Experimently find out whether the given diode is made of Germanium or Silicon. 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. 2. Resources. Zener diodes are also known as Our library is the biggest of these that have literally hundreds of thousands of different products represented. 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 how zener diode maintains constant voltage across the load? Explanation: VZ = VZo + MZ IZT 9. ii) If you get negative output it is in reverse bias mode. 11. Download baros daca maine ft bogdan ioana jibovivawosac cf. In ‘on’ state , the voltage across zener diode remains constant until the voltage across it deops less than VZ . In a Zener diode with high breakdown voltage. d) MOSFET. 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. 3 Theory of experiment The diode is a device formed from a junction of n-type and p-type semiconductor material. The voltage at which the zener diode breaks down is called the zener voltage. If the raw supply changes by 1.0 V, what is the corresponding change in the regulated output voltage? b) MOSFET What is a zener diode? electrical amp electronics engineering. ie., Dynamic resistance = change in voltage/resulting change in current = ΔV/ΔI ... Physics Experiment's Viva Questions. a) Almost a straight line parallel to y-axis While doing the experiment do not exceed the ratings of the zener diode. When a diode is heavily doped, it’s depletion region will be narrow. Answer: d It is a substance with conduction properties between metals and insulators. Answer: d c) The value of the resistance is the inverse of the slope of the i-v characteristics of the Zener diode when the voltage across the zener diode exceeds its zener voltage rating VZ) . Define what is zener voltage? Which of the following can be used in series with a Zener diode so that combination has almost zero temperature coefficient? a) Operational Amplifier The ripple factor is a measure of how successfully a rectifier converts ac to dc. Define what happens to the series current , load current and zener current when the dc input voltage of a zener regulator increases? Both P and N are heavily doped. Zener current and series current increases while the load current remains unchanged. 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. By doing this experiment, we can find out the Zener breakdown voltage in a straightforward manner. 3. c) Breakdown diode It is acting as normal diode while forward biasing. d) 9.24V. Zener Diode Viva Questions With Answers up reviewing habit. This may lead to What is a semi conductor? The Zener breakdown voltage is the minimum reverse biased voltage below which the diode blocks the reverse … b) It has dynamic resistance What do you mean by knee voltage and break down voltage? ZENER DIODE LAB VIVA Questions :-1. Mention any application of zener diodes, 10. c) 9.17V Answer: d Find the magnitude of regulating resistance, if the load resistance is … Different Zener diodes have a different breakdown voltage. B. Both P and N are lightly doped. Zener diodes can be effectively used in voltage regulator. 3. ... What is true about the breakdown voltage in a Zener diode? Ans. Direct current. Find VZ0 of the Zener model. 8. Engineering 2021 , Engineering Interview Questions.com. 13. 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. Derive the ripple factor of full wave rectifier. VZ = VZo + 5IZ = 8.96 * 5IZ. A. d) 1.04 mW, Your email address will not be published. Define what is zener voltage? The static or dc resistance of a diode is the resistance offered by it to the direct current . The Dynamic forward resistance of ‘Si’ Diode is_____ VIVA QUESTIONS: 1. What is meant by the temperature coefficient? 19. We should select a Zener diode with a breakdown voltage approximately equal to the voltage we need across the device. Zener diode is a p-n junction diode specially designed for operation in the breakdown region in reverse bias condition. Answer: c 1) The value of reverse current after the zener breakdown is called? Viva Questions… The reverse breakdown voltage of zener diode is called zener voltage. Zener Diode Experiment Viva Questions Port Manteaux Word Maker OneLook Dictionary Search. 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. Partial specifications of a Zener diode is provided. Zener Diode Characteristics Experiment Questions: Draw the reverse characteristics of zener diode and determine its break down voltage. Zener diode has the property of behaving like a dc battery in ‘on’ state (i.e. It destroys the diode. 2. Forward current. syllabus for b tech 1st year guru gobind singh. d) All of the mentioned. Viva Voce. Thus heavy current flows. I get my most wanted eBook. 5. Answer: a It equals the electric current times the resistance. 12. c) Transistor Physics Lab(15PHYL17/27) Viva Questions: EXPERIMENTS: 1. a) Voltage regulators If there is a survey it only takes 5 minutes, try any survey which works for you. 9.1 = VZo + 5 * 28 * 10-3 9. Zener Diode Multiple Choice Questions Answers; 41. 1. It is approximately constant. To draw the characteristics means behavior of current in forward and reverse bias of a semiconductor junction diode. Viva Questions: 1.What are break down diodes or zener so many fake sites. What is a zener diode ? Explanation: Note that the curve is v-I curve and not an i-v curve. Explain V-I characteristic curve of a diode. load Regulation = -120mV/mA . Zener diode is a P-N junction diode specially designed to operate in the reverse biased mode. Finally I get this ebook, thanks for all these Zener Diode Viva Questions With Answers Abfgas I can get now! Explanation: Zener diodes are used as voltage regulators but they aren’t called voltage regulators. Diodes which are designed with adequate power dissipation capabilities to … 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? this is the first one which worked! In order to read or download zener diode viva questions with answers abfgas ebook, you need to create a FREE account. 4. MOST LIKELY VIVA-VOCE QUESTIONS VTU physics lab I-V CHARACTERISTICS OF ZENER DIODE 1. The zener diode characteristics … It … b) For Zener voltage around 5V, TC can be made zero b) Resistor It decreases with the increase in diode … 15. Viva Questions: 1.What are break down diodes or zener diodes? c) Equally inclined to both the axes with a positive slope Feedback. Dictionary com s List of Every Word of the Year. Direct current. 2. 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