The breakdown voltage of a Zener diode can be set by controlling the doping level. List the other Zener diodes with different breakdown voltages. First, we will look at the general laboratory experiment and it’s format. Zener diodes not only stabilize long-term voltage fluctuations, but also short-term fluctuations as they are caused by the residual ripple of a rectified, pre-smoothed AC voltage. Not Specified Not Specified The function of CR1 is to provide additional regulation of the input voltage and form the basis of the reference output. All Study Guide At One Place Physics Practical Class 12. Ans:Generally the maximum zener voltage id about 200V. In voltage regulators. Procedure: Forward Bias Characteristics: 1. Developed by Amrita Vishwa Vidyapeetham & CDAC Mumbai. The critical parameter of this type of diodes is the Zener breakdown voltage. When the reverse bias voltage is greater than a predetermined voltage then the Zener … The following contains the verified lab manual record of the experiment for reference along with the readings. EXPERIMENT REQUIREMENT Components and Equipments a. Zener Diode (1N753) b. UNI-T Digital Multi-meter (UT 55) C. Variable Resistor (1 KO) d. GW Instek Oscilloscope (GOS-630FC) e. Resistor(33012,470N, 4.7K2, 47K22) f. K & H MFG. This post includes explanation of operation of Zener diode and V-I Characteristics of Zener Diode. Basically there are two type of regulations such as: Fig (3) - Circuit Diagram of  Zener Diode as Line Regulator: Fig (4) - Circuit Diagram of Zener Diode as Load Regulator: c) Zener Diode as Line Regulator (for variations in supply voltage): Connect the circuit for Line regulation as shown in figure (3). In the forward bias direction, the zener diode behaves like an ordinary silicon diode. Give the input as triangular voltage waveform from Function Generator (both positive and negative peaks). This article will help to explain the characteristics which make up zener diodes, specifically how the voltage across a zener diode varies with the current flowing through it. VI characteristics of zener diode 3. As a result, the bond breaks and electron hole pairs are generated. When the diode is in the reverse bias condition, the width of the depletion region is more. Add a 9V zener diode in parallel with the - kΩ load resistance in Figure 9 and repeat the 2-measurements in step 7. Ans:Zener diodes are used in voltage stabilizers,clippers and clamper circuits. While doing the experiment do not exceed the ratings of the diode. What is the difference between p-n Junction diode and zener diode? Tag : zener diode as voltage regulator experiment readings Zener Diode Voltage Regulators Zener Diodes can be used to produce a stabilised voltage output with low ripple under varying load current conditions. Physics Investigatory To Study V I Characteristics Of Zener . In the reverse bias direction, there is practically no reverse current flow until the breakdown voltage is reached. This property of zener diode makes its use as a voltage regulator. Zener diode characteristics can be observed. The VI characteristics of a zener diode is shown in the below figure. Any kind of infringement will lead to legal action. 10. The Zener diode specially made to have a reverse voltage breakdown at a specific voltage. The range of values goes from a few Volts up to about 200 Volts. Zener diode has the property of behaving like a dc battery in ‘on’ state (i.e. To draw the characteristic curve of a Zener diode and to determine its reverse breakdown voltage. Compare Zener Breakdown and Avalanche breakdown? It permits current to flow in the forward direction as normal, but will also allow it to flow in the reverse direction when the voltage is above a certain value - the breakdown voltage known as the Zener voltage. ZENER DIODE CHARACTERISTICS EXPERIMENT 2018 - Duration: 6:58. If there is no load resistance, shunt regulators can be used to dissipate total power through the series resistance and the Zener diode. Theory. Initially, a negligible constant current flow through the zener diode in its reverse bias but at certain voltage, the current becomes abruptly large. Figure . The device, because of one P-N junction, is quite similar to a diode but it differs from an ordinary diode as it has three terminals. In addition, the breakdown voltage is specified as a minimum only. A very good test you can do is to check a zener diode with your multimeter set to the ohmmeter setting. മലയാളം Shorted Diode. There is a controlled breakdown which does not damage the diode when a reverse current above the Zener voltage passes through a Zener diode. Funded by MeitY (Ministry of Electronics & Information Technology), English The readings of voltage and current are tabulated. We are going to learn about an experiment to find out the Zener breakdown voltage and draw the characteristics of Zener diode. Here the Zener diode acts like an ordinary diode. Open Diode. Ans: The forward voltage at which the current through the junction starts increasing rapidly, is called the knee voltage or cut-in voltage. What are the applications of Zener diode? This is an individual effort but members of a team can and should share insight, confirm results, and help problem solve. 1. zener diode. हिंदी If a zener diode reads a voltage near its rated zener voltage, VZ, then it is good. The process becomes cumulative and leads to the generation of a large number of charge carriers resulting in Avalanche Breakdown. 1. It is generally 0.6v for a  Silicon diode. Take the readings and note Voltmeter reading across Zener diode and Ammeter reading. 6. Ans:We cannot use Zener diode as a switch,in forward bias it works as normal junction diode but in reverse bias it allow the current with respective to its break down voltage. This document is highly rated by JEE students and has been viewed 162 times. Applying a reverse bias causes a strong electric field get applied across the device. analyze the forward and reverse bias characteristics of Zener diode. When forward biased voltage is applied to the zener diode, it works like a normal diode. Voltage (V. 3) Temperature Coefficient Zener Impedance (R2 . Tabulate different reverse currents obtained for different reverse voltages. Characteristics. As the applied reverse voltage tends to increase that result in the increment of the width of the depletion region. 1-3 2. 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