Ok check this out my EE201 teacher it totally out of it he is never shows for office hours his voice mail is full it takes him aweek to respond to an email.
So I wrote him a letter brifely explaining that i'm getting fursting with the homework
Dr. Prasad,
I am writing just to let you know that the homework that you assign can be very
frustrating at times.
I am quickly coming to appricate the complex and challanging nature of networks (which
I can say can be extremly satifsying to solve a network problem that has been
challanging me to fully understand the current class topic.), it however can be very
frustating to work though a homework problem and have no clue if the answer that I
have dirived is even a reasonable one. For example in Civil Engineering when I'm doing
work with soils or stresses in members and I come up with the answer to a problem I
have a 'gut feeling' if my answer is reasonable or not.
With networks however I don't have that feeling yet. Granted I know that the it is
something that comes with alot of practice, at this early stage in the game I am lacking
that feeling.
In order to help us acheive this 'gut feeling' of weather or not our answers are correct
and to help us better learn the material (one of the many things that I have learned in
Engineering is that the answer is almost as never important as the logic used to generate
the answer) when you assign the homework if you could provide the answer to the
problem so that when we solve our homework we will have instant feedback on weather
or not wee sovled the problem correctly.
-Joshua Davis
His responce:
Dear Joshua,
First of all I am sorry that you feel frustrated. Let me assure you, there is no need for
that. The important thing that you need to understand in class is how to analyze circuits.
Your classroom understanding of problem solving must be clear. That requires asking
questions. There is never a dumb question. That is my philosophy in teaching. You must
ask how and why, not recklessly of course. By asking these questions you will follow how
problems are solved. If there was one way to solve all problems I am sure someone
would have already made that money!! The roadmap for each problem is slightly
different unless they are the same problem with differnt values.
Since I have taken the time to reply in fair amount of detail you must be convinced that
I do care about what you wrote. You must develop that sense of problem-solving. I
mean this in a very positive way.
The challenge really is how you can apply KCL, KVL, and Ohm's Law in all combinations
to solve a problem. You apply current division principles where there is current division.
You apply voltage division wherever there is reason for voltage division. You combine
resistors in series and parallel whenever they offer the convenience of lumping several
elements into one. There is a difference between a souce and a load. A source produces
and a load consumes. If a load is assumed to consume "posite" power, a source by its
virtue would have to have a negative sign for computed power. Ideal sources are
considered lossless. Their value remains the same. No amount of current flowing through
an ideal voltage source can change the voltage across its terminals. This must mean that
the internal resistance is zero. Similarly no amount of voltage a current source can
change the value of an ideal current source. This must mean the internal resistance is
infinitely large, effectively an open-circuit. These are the types of concepts that are
helpful in solving problems. The fact that no two problems are alike gives the motivation
to learn the basic concepts very well. With that you can solve any problem. You don't
need answers to chech against. If you did everything meanigfully then your answers
must also mean something!!
Now my fingers are hurting. So I will stop.
I am sure you got my message.
Ram Prasad
He didn't even read my message, well he did but I don't think think it was in Engineering speak for him to understand it.