eblc1388 said:
A battery is an energy store. It stores chemical which reacts to give energy. After the chemical used up or the reaction stops, no more energy.
Ok, understood.
eblc1388 said:
It is like a bank saving account. Initially you have a large deposit in it. If you draw only little at a time(like $1) then the account balance can stay positive for a long time.
Ok, understod.
eblc1388 said:
If you draw ($100 or $1000 /per day) then the account deposit will soon be used up. It is the same case for a battery. Drawing lower current will enable the battery to last a longer time. A such, low value resistor draw large current and high value resistor draws little current.
Ok, I understand this in theory. What I am trying to understand is "what" is this "draw" of energy. Why does something draw the energy and why do others resist? Or do these things happen at the same time?
eblc1388 said:
The "thing" (or in proper electrical terminology, the "load") that you connects to the battery terminals determines the current value and thus power consumption and nothing else. The battery cannot limit the power consumption if it is below its maximum output current(owing to internal resistance but that's another story).
If the battery cannot limit it's output current then I don't understand where this current goes if the power consumption in the "load" is less than what the battery supplies.
eblc1388 said:
You're saying "the resistance is wasted as heat" is not correct. The resistance does not change but the "electrical power" is wasted as heat in the resistor, not before the resistor.
Well, grammer error. I really meant the resisted power, the power that is being wasted as heat is this resisted power while the remainder is the actual result of the rest of the power getting through.
When I think back to pics and leds, i think this.
Pic is a small micro device that uses clock cyces. Perhaps the low current "Draw" has something to do with the clock cycles and how it uses energy consumption, whereas leds are a constant burning of energy mostly as light.
This basic electricy thing feels like it's right on the tip of my tongue but i need that one example that pushes me over to see the big picture.
I have a computer background, I am a profressional application developer for a large financial firm. When it comes to understanding the basic understanding of electricity and it's laws, there is just something that I am not getting here.
I have a good understanding that, basically, we have a power "source" that is consumed by the "load". There are a variety of electrical components that allow storing, resisting, inducing etc of this energy. What I am trying to figure out right now is why there is this draw of energy over the voltage?
Someone ick me in the head!