Wednesday, 22 October 2008

Philosophy in Engineering

tag: in English

"One of the fundamental laws of nature is that no energy conversion is possible until there is some one to oppose the conversion. Without the presence of this opposition, there’d simply be no energy conversion." [Theraja, ‘Electrical Technology’, S. Chand & Company Ltd., 1978.]


Amid my Coelho adventure, amid my process of becoming more and more out of mainstream
(with a sincere comment from a friend: "Vita you are ya now insane!", amid my overseeing in every minute part of life, I laughed when I read the above lines from an engineering textbook. I was reading to find some understanding about the so-called
'back torque' in a loaded generator. And before I continue, you might want to know the basic, so here's a little bit of that, for you :)..

So imagine a generator, like one below, with magnet on the stator and the armature in the rotor (from http://leifi.physik.uni-muenchen.de/web_ph10/versuche/11generator/generator.htm)



Then,take a look at the figure below (from Theraja's Electrical Technology): a generator whose rotor (armature) is being driven clockwise by its prime mover. Fig (a) represents the main magnetic fields set and the magnetic field caused by armature conductors like 'A' in the figure.
The resultant field (flux lines) are shown in Fig. (b). It's seen that there's a crowding of lines of flux on the right-hand side of A. These magnetic lines of flux may be likened to the rubber bands under tension. Hence, the bent lines of flux set up a mechanical force on A much in the same way as the bent elastic rubber band of a catapult produces a mechanical force on the stone piece.


….it will be seen that this force is in a direction opposite to that of armature
rotation. Hence, it is known as backward force or magnetic drag on the conductors.
It is against this drag acting on all armature conductors that the prime mover has to work. The work done in overcoming this opposition is what converted into electrical energy.

In fact, it seems to be one of the fundamental laws of nature that no energy
conversion from one form to the other is possible until there is some one to oppose the conversion. Without the presence of this opposition, there’d simply be no energy conversion. [Theraja, 1978]

Cool, eh? That's simply the law of nature: no opposing force, no work done. So that's one simple answer why life's always challenging us ..

Relating this post to my favourite Coelho's Fifth Mountain, I'd like to recall some very trickling (? how can I say that in English.. :D) lines from it.. Elijah decided to go against God.. very trickling that I decided to buy a copy :)..
But finally, in the end, it's said What Elijah thought was a challenge to God was, in truth, his reencounter with Him.

Yes, because “There are moments when God demands obedience. But there are moments in which He wishes to test our will and challenges us to understand His love."

So, finally, life's always challenging, huh? because again, "without the presence of this opposition, there’d simply be no energy conversion.", and without life which sometimes opposing us, how can we prove our full potential as grand human beings???

Phew. Too philosophical. :D

(and so I think it's sometimes okay that.. ..Elijah's against God. Pilar's against God. and Vita also. Sometimes I guess it's okay :))

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