Ohms law

There is a useful Wiki article here. It goes into more detail (and history) than you need but is interesting.

You don't need to think about photons, electrons, ions or such stuff to understand and design perfectly good electronic circuits.

I visualise circuits in terms of conventional current flow all the time - I don't give damn which way the electrons are going or how fast they actually move.

https://en.wikipedia.org/wiki/Ohm%27s_law#History

MK.

Sorry, I don't buy into the lack of basic knowledge of electronics is good thing meme. It leads to making simple mistakes

that leave the mistake maker with no clue as to why it doesn't work or how to fix it.

Please, please don't put words into my mouth.

And if you have circuit design example, of the kind that the OP is reasonably likely to encounter, where the actual speed or direction of motion of electrons (or, with due respect to DAB, if they actually move at all) in a wire matters, please cite it.

To use an analogy, I know how the engine my truck works. When I'm driving it I don't think about injectors and pistons, I think about the torque demand pedal. I could run a perfectly good delivery service without knowing anything about how engines work. In the same way I can design perfectly good active RC filters without thinking about a single electron.This doesn't imply that it is good or bad to know or not know about electrons or engines - just that it doesn't always help.

To quote Einstein: "Everything should be as simple as it can be, but not simpler", the appropriate level of simplicity obviously depends on the context and the application.

MK

michaelkellett I'm with you.

I've managed all these years without worrying about the unseen things causing it to happen.

Quite frankly I don't really care which way they actually move, as long as something is moving there is current flowing.

For the debaters ...

I'm sure there is room for this debate, but hijacking what I would consider a reasonable question about a formula, may not be the best place.

If you want to start another conversation, I have a really humourous story to add about the possibility of thinking alternatively.

Mark

Hi Mark,

I am sorry about my part in the Hijack. I forgot the simple rules of the forum which state:

Never Hijack someone else's thread nor participate in such Hijack with only these few exceptions:

1. You feel like it.

2. You forgot to say something to another poster last week.

3.The current thread reminds you of something you heard or read.

4. You need 5 more points to break into the next level.

5. The Hijack subject is really cool.

6.

Since I am out of time and need to run I would welcome help with the rest of the list. Remember this is all for the sake of science.

John

Never Hijack someone else's thread

Except in TM where the idea is to see if we can change the subject content to soemthign entirely different.

I just think that there is room for the debate, just not in this post.

salesm21

Hopefully you've got some things to help you rearrange how you see it.

I tend to have to match things a little and then suddenly they click into place, with the thought Duuuh, why didn't I see that before ....

Mark

wait, is this my cue to post cat pictures again?

wait, is this my cue to post cat pictures again?