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Topic : semiconducor device part 1
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Solids and Semi Conductor DevicesHigh Yield Facts 1. The solids in which the atoms are arranged ia definite, regular and long range order are said tbe crystalline, otherwise if the atoms are arrangein indefinite, irregular and short range order, theare called amorphous.2. Amorphous substances are termed as glasssubstances, since glass is an amorphous solid.3. Crystalline solids are bounded by flat surfaceand possess uniform chemical composition whilthe distribution of atoms or molecules in amorphousolids are random and chaotic and they are nobounded by flat surface.4. Crystalline solids are anisotropic i.e. the physicaproperties like thermal c
Topic : Semicon ductor device part 4
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83. Thremionic emission is surface phenomena.84. When a hydrogen atom goes from the groundstate to the first excited state in which kinetic energydecreases and potential energy increases.85. The property of random arrangement of atomsare common to liquids and amorphous solids.86. The possible number of Branais lattices in spaceis 14.87. The molecular crystals are solid at lowtemperature because of the Vander Walls forcearising out of polarisation.88. In a semi conductor, the forbidden energy gapis of the order of 1 eV.89. Electrons moving like the molecules of a gasexist in metallic solids.90. The free electron model of metallic solid doesnot explain the range of re
Topic : What Are You Doing After Graduation?
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What Are You Doing After Graduation? Your chances of having a good job?maybe even the perfect entry-level job?are better than ever. According to Job Outlook 2007, employers plan to hire 17.4 percent more new college graduates from the class of 2007 than they did from the class of 2006."This marks the fourth straight year that employers have projected percentage increases in the double digits," says Marilyn Mackes, executive director of the National Association of Colleges and Employers (NACE), the organization that performs the annual survey.More employers across all sectors?service, manufacturing, and government/nonprofit?are planning to hire more ne
Topic : A reverse problem: Finding projectile parameters from its equation
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Most of you have read projectiles and know how to find the equation of trajectory when the initial velocity, angle of projection are given.Lets consider a reverse problem: Given a general quadratic equation, lets find its initial velocity, angle of projection, time of flight, etc., etc, etc ....Consider a quadratic equation y = ax2+bx+c -------------(1)The X axis is considered to be the horizontal plane, and the Y axis is vetial, positive up.Now, for this equation to represent a projectile, it should be a parabola that opens downwards, ie, a<0Also, it should have two real roots. For the case of a single real root, the equation represents a particle thrown vertica
Topic : hall effect-tips to crack jee
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It is not the famous "hall effect" of physics that we are going to talk about.We are going to talk about how the examination day itself effects you examination performance.So you are thinking ,"what the hell examination hall has to do with our JEE exams??, well then to answer you , it can make you spoil your paper or it can help to accelerate your efficiency and hence your performance. Last few weeks and of course the examination day and the night before has a determining effect on your JEE performance. This analysis focusses upon various factors that effect you
Topic : motion in one dimension
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Motion in 1 DimensionTHIS THING IS ALL LONG AND NO WIDE... We will begin this lesson in mechanics by throwing out some of the complicating issues which clutter the general picture. Then when we have a solid understanding of the basics we can add these discarded factors back into our thinking. For the time being we will describe the motion we are studying in terms of space and time without explicitly considering the agents that cause the motion. This simplification is so common that a name has been given to this branch of mechanics. It is called kinematics . One of the fundamental concepts in kinematics is displacem
Topic : If titanic was made in india.......
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If the Titanic was made in India......... 1) There would be 10 times as many people on the ship 2) There would be a song with Kate Winslet in a white saree and ofcourse singing in the rain 3) The movie would be called "Pyar Kiya To Marna Kya" 4) Hero and Heroine would float in cold water for days and stillsurvive, but the villian would die in the first dip 5) The iceberg would be sent by the heroine's father to teach the heroa lesson 6) None of the women would float due to heavy designer sarees. And last but not least 7) Half of the rescue boats would be reserve for SC/ST/OBC**** *
Topic : Collogative Properties
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In chemistry, colligative properties are properties of solvents which are affected by the number of particles into which a solute separates when mixed with a solvent.The four Colligative Properties are: Vapor pressure lowering: When you add a solute to a solvent, you will have some solute molecules that linger at the surface of the liquid. Once the solute is dissolved into the solvent, the amount of solvent molecules hovering over the surface, known as vapor, will decrease and so the vapor pressure of the solvent will have decreased. Freezing point depression: The presence of a solute lowers the freezing point in a solution. It is lower than the freezing
Topic : top 20 t-school survey
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this was released by dataquest magzine about the top 20 t-schools of india 2007acc to them Rank Institute Composite Score 2006 Rank 1 IIT-Kharagpur 84.4 3 2 IIT-Madras 77.9 1
Topic : 5 step method for attaining goals!!
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Five step method for attaining goals.. I have always been facsinated by this.. how to achieve my goals.. how to overcome my laziness and complacency.. how to take out the best of myself.. Although i never myself really tried to achieve that!! I was a little satisfied with what i was doing, not knowing that i had immense potential and capability to achieve anything i wished (all of us have!). As they say, 'complacency kills'. It was killing me! I believe many people can relate to this (though i wish not ). So here's something for all of us, these magic formulae for attaining your goal
Topic : Meaning of 'x is a function of y'
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Suppose I make the assertion: "x is a function of y." What does thisstatement mean, what are its implications? 1. The variable y is to be considered the independent variable.2. The variable x is to be considered the dependent variable.3. The acceptable values of the variable y vary over a set of numbersthat is referred to as the domain of the function.4. The values of the function are symbolically represented by theletter x. The values of the function come from the range of thefunction.5. There is some rule of association { a rule that associates witheach value of y in the domain of the function, a correspondingvalue of x in t
Topic : To make u smile!!
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To make you smile... Cat listening to Lata Mangeshkar Cat listening to Himesh Reshmia Cat listening to BABA Ram Dev Cat listening to Anup Jalota Cat listening to Kumar Sanu Cat listening to you Have Fun.....Regards,Aravindh!! Plz. rate me if u like this
Topic : History of the Metre
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Early historyThe first units of length were based on the human body, the most obvious example being the foot. Other body-based units are the cubit, which is the length of the arm from the elbow to the tip of the middle finger (roughly 18 to 22 inches), and the span, which is the distance between the tip of the thumb and little finger when the fingers are extended. The hand is still used to measure the height of a horse. Needless to say, these units can vary widely from person to person, and an example of allowing for this variance can be seen in the 12th century Scottish definition for the inch, which was taken to be the thumb width from three men - one big, one med
Topic : RESNICK HALLIDAY ONLINE!!!!!
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here u find interactive probs and their solutions of Halliday Resnick.. check this out! http://bcs.wiley.com/he-bcs/Books?action=index&itemId=0471320005&itemTypeId=BKS&bcsId=1074
Topic : IDIOMS
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I am not so good in verbal english but recently i got to learn some new idioms and phrases........so i thought i would like to share it with you........1.A dark horse: A person who does not talk much to others abt. his activities.2.A dog in the manager: Selfish person.3.A feather in ones cap: An achievement of which one can be proud.4.A live wire: An active person.5.A man of straw: An useless person.6.A square peg in a round hole: A person who is not suited to his position.7.A white elephant: Costly affair.8.A wild goose chase: A futile effort.9.Jack something in: Stop doing something.10.Keel over: Lose one
Topic : transformation of graphs 2
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Case 4To draw the graph of form y = | f(x) | (graph 4) Draw the graph of y = f(x) (in yellow) then restore that part of the curve, which is above x-axis. Take the reflection of the part of the curve which is below x-axis (in yellow) wrt to x-axis. Then erase the part which is below x-axis... The restored part along with the reflection will be the required curve (in red dotted) Case 5To draw the graph of form y = f(|x|) (graph 5) Draw the graph of y = f(x) (in yellow) and then erase the part which is to the left of y-axis. Take the reflection to the part of the curve lying to the right of y-axis assuming y-axis as mirror. The part of the curve, which i
Topic : 13 WORDS OF GLORY
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There are exactly 13 words which start with 'q' but do not get followed by 'u'....could someone please name them.....once there was an article in some newspaper listing these words....but i dont have them....please try to answer them if interested....please dont reply with the word 'qatar'.
Topic : A method to extract silver?
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One way to extract silver from silver sulphide is to first prepare a complex salt of silver sulphide and then react it with zinc to get 2 mole silver(as per the 12th textbooks on silver extraction).it is a long two step process. now here is a short one step process by reacting silver sulphide with zinc an still we get 2 mole of silver. So why cannot we use the second process? answer completely..
Topic : Intel Inside (IQ)
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Q. How can you drop a raw egg onto a concrete floor without crackingit?A.Concrete floors are very hard to crack! (UPSC Topper)Q.If it took eight men ten hours to build a wall,how long would ittake four men to build it?A. No time at all it is already built. (UPSC 23 Rank Opted for IFS)Q.If you had three apples and four oranges in one hand and fourapples and three oranges in the other hand, what would you have?A. Very large hands.(Good one) (UPSC 11 Rank Opted for IPS)Q. How can you lift an elephant with one hand?A. It is not a problem, since you will never find an elephant withone hand. (UPSC Rank 14 Opted for IES)Q. How can a man go eight days without sleep?A. No
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