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- 50 top MCQ | exams | semiconductor diodes and it’s applications| question and answers
- Electronic Devices - Special-Purpose Diodes
Answers indicated green with hints if required. A pure semiconductor is often referred to as. In a p-type semiconductor, the majority current Carriers are. A p-type semiconductor is a semiconductor doped with. A trivalent impurity.
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They are called breakdown diodes since they operate in breakdown region. The value of the resistance is the inverse of the slope of the i-v characteristics of the Zener diode. Which of the following can be used in series with a Zener diode so that combination has almost zero temperature coefficient? Zener diodes can be effectively used in voltage regulator. However, they are these days being replaced by more efficient.
50 top MCQ | exams | semiconductor diodes and it’s applications| question and answers
Solved examples with detailed answer description, explanation are given and it would be easy to understand. Here you can find objective type Electronic Devices Special-Purpose Diodes questions and answers for interview and entrance examination. Multiple choice and true or false type questions are also provided. You can easily solve all kind of Electronic Devices questions based on Special-Purpose Diodes by practicing the objective type exercises given below, also get shortcut methods to solve Electronic Devices Special-Purpose Diodes problems. Zener diodes with breakdown voltages less than 5 V operate predominantly in what type of breakdown?
Post a Comment. For a PN junction, match the type of breakdown with phenomenon. Avalanche breakdown. Zener breakdown. Punch through. Collision of carriers with crystal ions.
Electronic Devices - Special-Purpose Diodes
It can, therefore, be represented by a battery of 50 V as shown in Fig. The first step is to determine the state of the zener diode. Consequently, it can be replaced by a battery of 50 V as shown in Fig. Under such conditions :.
A Zener diode is a special type of diode designed to reliably allow current to flow "backwards" when a certain set reverse voltage, known as the Zener voltage , is reached. Zener diodes are manufactured with a great variety of Zener voltages and some are even variable. Diodes with a higher Zener voltage have a more gradual junction and their mode of operation also involves avalanche breakdown. Both breakdown types are present in Zener diodes with the Zener effect predominating at lower voltages and avalanche breakdown at higher voltages.
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Zener diode is a p-n junction diode specially designed for operation in the breakdown region in reverse bias condition. 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. Define what happens to the series current , load current and zener current when the dc input voltage of a zener regulator increases? This property of zener diode makes its use as a voltage regulator. Thus zener diode maintains voltage constant across the load. When a high reverse voltage is applied across the junction, there will be very strong electric field at the junction. And the electron hole pair generation takes place.
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