Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Electrical & Electronics Expert

problem 1:

a) What do you mean by Fermi level? By indicating the position of Fermi level in intrinsic, n-type and p- type semiconductor, describe its significance in semiconductors?

b) Sketch V-I characteristics of a PN diode for the given conditions:

i) Rf = 0, Vγ = 0, Rr = ∞
ii) Rf = 0, Vγ= 0.6V, Rr = ∞
iii) Rf = Non-zero, fixed value, Vγ = 0, Rr = ∞
iv) Rf = Non-zero, fixed value, Vγ = 0. 6V, Rr = ∞

Where Vγ is the cut-in voltage, Rf is the forward dynamic resistance & Rr is the reverse dynamic resistance of the diode.

problem 2:

a) What do you understand about the depletion region at a PN junction, with the help of essential diagrams and derive expression for barrier potential.

b) Derive the expression for transition capacitance, CT of a PN diode.

problem 3:

a) With the help of necessary sketches describe the potential distribution in an open circuited PN junction.

b) With the help of V-I Characteristics, describe the operation of a PN Diode under Forward bias and Reverse bias.

problem 4:

a) Describe Avalanche and Zener break down mechanisms in semiconductors and also compare them?

b) For Zener diode circuit shown in figure below, find out VL, VR, IZ & R.

2282_avalanche and zener.jpg

problem 5:

a) Describe the V-I characteristics of Zener diode and distinguish between Avalanche and Zener Break downs.

b) In a Zener diode regulator, the supply voltage = 300V, Vz = 220V, Iz = 15mA and load current = 25mA. Compute the value of resistor required to be connected in series with the Zener diode.

problem 6:

a) Describe the effect of temperature on V-I characteristics of a diode.

b) Differentiate between drift and diffusion current in a semiconductor. Illustrate continuity equation.

Electrical & Electronics, Engineering

  • Category:- Electrical & Electronics
  • Reference No.:- M93497

Have any Question? 


Related Questions in Electrical & Electronics

1 what is the determinant expansion for the curl of a

1. What is the determinant expansion for the curl of a vector? 2. What is the significance of the curl of a vector being equal to zero? 3. State Ampere's circuital law in differential form for the simple case of How is i ...

1 what is the direction of the magnetic field for a uniform

1. What is the direction of the magnetic field for a uniform plane wave having its electric field in the positive z-direction and propagating in the positive x-direction? 2. What is intrinsic impedance? What is its value ...

An output interface in a switch is designed using the leaky

An output interface in a switch is designed using the leaky bucket algorithm to send 8000 bytes/s (tick). If the following frames are received in sequence, show the frames that are sent during each second. ? Frames 1, 2, ...

1 what is snells law2 what is meant by the plane of

1. What is Snell's law? 2. What is meant by the plane of incidence? Distinguish between the two different linear polarizations pertinent to the derivation of the reflection and transmission coefficients for oblique incid ...

1 assume alice needs to send a confidential signed document

1. Assume Alice needs to send a confidential signed document to 100 people. How many keys does Alice need to use to prepare 100 copies if she uses asymmetric-key confidentiality? Explain. 2. In a club with 50 members, ho ...

1 explain why rtp cannot be used as a transport-layer

1. Explain why RTP cannot be used as a transport-layer protocol without being run on the top of another transport-layer protocol such as UDP. 2. Both TCP and RTP use sequence numbers. Do sequence numbers in these two pro ...

1 distinguish between voltage as applied to time-varying

1. Distinguish between voltage, as applied to time-varying fields, and potential difference. 2. What is a conservative field? Give two examples of conservative fields. 3. Describe the equipotential surfaces for a point c ...

Consider a bar element as shown in the figure the

Consider a bar element as shown in the figure. The cross-sectional areas are A 1  and A 2  at nodes 1 and 2, respectively, and vary linearly. In addition, the gravitational acceleration is applied along the axial directi ...

1 state and briefly discuss the basic definition of the

1. State and briefly discuss the basic definition of the curl of a vector. 2. What is a curl meter? How does it help visualize the behavior of the curl of a vector field? 3. Provide two examples of physical phenomena in ...

1 a synchronous alternator is supplying 09 pu power to the

(1) A synchronous alternator is supplying 0.9 p.u. power to the grid when a temporary three-phase short occurs on the interconnector. The power angle curves are:- Pre-fault = 2.0 sin(delta) During fault = 0.5 sin(delta) ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

WalMart Identification of theory and critical discussion

Drawing on the prescribed text and/or relevant academic literature, produce a paper which discusses the nature of group

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro