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A transistor consists of __________. (one pn-junction, two pn-junctions, three pn-junctions, None of these)

Asked by Narendra Kumar Sharma 18/02/2015 Last Modified 18/02/2015

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Learn Class XI-XII Tuition (PUC)

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why current is scalar quantity but current-density a vector ?

Current is not a scalar quantity....its a tensor quantity as its direction is fixed. Current density is current per unit area and as area is a vector quantity so is the current density.

Ranjan Mishra

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How can I calculate the value if adj. of a in a matrix simply?

If you know that det of the matrix A then det(adj(A)) = ^(n-1, where n is the order of the matrix A (ofcourse square matrix)

Akash

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Hi friends. I thought of sharing something wonderful i found on web so that it can help all of us & augment our understanding of the topic - 'Limit' . I have shared the complete pdf in my profile gallery or the original web link at the end of this post. An Intuitive Introduction To Limits Limits, the Foundations Of Calculus, seem so artificial and weasely: “Let x approach 0, but not get there, yet we’ll act like it’s there… ” Ugh. Here’s how I learned to enjoy them: What is a limit? Our best prediction of a point we didn’t observe. How do we make a prediction? Zoom into the neighboring points. If our prediction is always in between neighboring points, no matter how much we zoom, that’s our estimate. Why do we need limits? Math has “black hole” scenarios (dividing by zero, going to infinity), and limits give us a reasonable estimate. How do we know we’re right? We don’t. Our prediction, the limit, isn’t required to match reality. But for most natural phenomena, it sure seems to. Limits let us ask “What if?”. If we can directly observe a function at a value (like x=0, or x growing infinitely), we don’t need a prediction. The limit wonders, “If you can see everything except a single value, what do you think is there?”. When our prediction is consistent and improves the closer we look, we feel confident in it. And if the function behaves smoothly, like most real world functions do, the limit is where the missing point must be. Key Analogy: Predicting A Soccer Ball (associated pics in original post) Pretend you’re watching a soccer game. Unfortunately, the connection is choppy: So we missed what happened at 4:00. Even so, what’s your prediction for the ball’s position? Easy. Just grab the neighboring instants (3:59 and 4:01) and predict the ball to be somewhere in between. And… it works! Real world objects don’t teleport? they move through intermediate positions along their path from A to B. Our prediction is “At 4:00, the ball was between its position at 3:59 and 4:01?. Not bad. With a slow motion camera, we might even say “At 4:00, the ball was between its positions at 3:59.999 and 4:00.001?. Limits are a strategy for making confident predictions. Limits aren’t the only tool for checking the answers to impossible questions; infinitesimals work too. The key is understanding what we’re trying to predict, then learning the rules of making predictions. Happy math. (Original author - Mr. kalid ) Original post link: http://betterexplained.com/articles/an-intuitive-introduction-to-limits/ My profile link: https://www.urbanpro.com/delhi/pankaj-k/2531974 You may find more interesting stuff and information that can be of some help to you. I will be adding more pdfs in gallery soon . Sharing is caring.

If one wants the pdf in my galley on 'limits' can give a better understanding of the same material.

Pankaj

5 2

Amongst the foreign authors which books are good for chemistry? You could tell me separate books for organic, inorganic and physical chemistry or just one big book of all, any will do.

Question:Santosh posted a Question in Class XI-XII Tuition (PUC) Amongst the foreign authors which books are good for chemistry? You could tell me separate books for organic, inorganic and physical chemistry...

Santosh

1 1

Can you find general solution of this equation dy/dx= (1+cosx)/(1-cosx).

int y *dy = int (1+cosx)/(1-cosx) *dx int y *dy= int ( 2 cos^2 x/2) / (2 sin^2 x/2) *dx int y *dy= int (cos^x/2) / (sin^2 x/2) * dx int y *dy= int (cot^2 x/2) * dx y = - (cosec ^ 2 x/2 ) / (1/2) +c y = -2 cosec ^2 x/2 ) +c

KM M Chary

0 0

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