Reverse bias, Electrical Engineering

Assignment Help:

Reverse bias

Reverse biased generally refers to how a diode is employed in a circuit. If a diode is reverse biased, the voltage at the cathode is gets higher than that at the anode. Hence, no current will flow till diode breaks down. Connecting the P-type region to the negative terminal of the battery and the N-type region to the positive terminal corresponds to reverse bias. The connections are demonstrates in the following diagram: 

728_Reverse Bias 2.png

Figure: (a) Blocks of P and N semiconductor in contact have no exploitable properties. (b) Single crystal doped with P and N type impurities develops a potential barrier.

This type of separation of charges at the PN junction constitutes a potential barrier. This potential barrier has to be overcome through an external voltage source to form the junction conduct.

523_Reverse Bias 1.png

Figure: A silicon p-n junction in reverse bias.

The creation of the junction and potential barrier occurs during the manufacturing process. The magnitude of the potential barrier is a function of the materials employed in manufacturing. Silicon PN junctions comprises a higher potential barrier than germanium junctions.


Related Discussions:- Reverse bias

What are the steps concerned to fetch a byte in 8085, What are the Steps co...

What are the Steps concerned to fetch a byte in 8085 The PC places the 16-bit memory address on the address bus The control unit sends the control signal RD to enable

Describe the operation of 8279, Q. Describe the operation of 8279. And als...

Q. Describe the operation of 8279. And also explain following terms: (i) N key Roll over. (ii) Key board debounce. (iii) FIFO RAM. Ans: 8279 is a programmabl

Low pressure gas hazards, Low Pressure Gas Hazards : Safety screens and wi...

Low Pressure Gas Hazards : Safety screens and wire-mesh guards should be placed round evacuated glassware and safety goggles or a face shield must be worn against the possibility

Hardware requirement - gis technology, Hardware Requirement- Se...

Hardware Requirement- Server of adequate sizing for enterprise-wide deployment for storing maps and geospatial data. Application server and web server. Desktops

State fleming''s right-hand rule, Fleming's Right-hand rule states: Let ...

Fleming's Right-hand rule states: Let the thumb, first finger and second finger of the right hand be extended such that they are all at right angles to every other. If the first

Example of binary subtraction of negative number , Example of binary subtra...

Example of binary subtraction of Negative number Case 2.   Negative number is more than  the positive number ( i e, answer  is negative)  Example : Subtract 92 10 ( 101

Ac motors, AC Motors DC motors that have their magnetic fields produce...

AC Motors DC motors that have their magnetic fields produced by coils as described earlier can, in principle,  be powered from AC as well, since if the applied voltage reverse

What do you mean by dearness allowance, Q. What do you mean by Dearness All...

Q. What do you mean by Dearness Allowance? Ans: Dearness Allowance is in the type of compensation for Established increase in the cost of living and comprised of Dearness All

How do you modify the direction of rotation of a d.c. motor, Q. How do you ...

Q. How do you modify the direction of rotation of a D.C. motor? Ans: The direction of rotation of DC motor will be changed either by changing the field winding connections o

Standby mode, Standby mode:In this mode, one processor is active and other ...

Standby mode:In this mode, one processor is active and other is on standby, both software and hardware wise. Standby processor brought online when active processor fails. A vital r

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd