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Why is electricity so hard to understand? (1989)

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Re: Why is electricity so hard to understand? (1989)

#11
post #8

Could someone write the same kind of article for chemistry ? That would help me to accept the fact that I didn't get it at all :-) Oh, while you're at it : accounting :-)

The issue with chemistry is that you need to develop a "feel" (chemical intuition) for a lot of topics. A lot of chemistry taught in undergrad, like Organic, cannot always be neatly explained or solved with an equation. On top of that there seems to be as many exceptions to rules as there are rules themselves.

Re: Why is electricity so hard to understand? (1989)

#12
I think the main reason is that we can't physically interact with it with our hands. We don't play with it as children, the same way we do running water, throwing rocks, etc. Anything that you can't manipulate or play around with is very hard to develop an intuitive sense of. It takes a lot of study and imagination.

Re: Why is electricity so hard to understand? (1989)

#13
post #12

I think the main reason is that we can't physically interact with it with our hands. We don't play with it as children, the same way we do running water, throwing rocks, etc. Anything that you can't manipulate or play around with is very hard to develop an intuitive sense of. It takes a lot of study and imagination.

> We don't play with it as children, the same way we do running water

Navier-Stokes equations are not easy to understand.

Re: Why is electricity so hard to understand? (1989)

#14
post #7
post #6

In fact, it isn't so hard that they would like you to believe - it just seems that way when they remove the best parts due to national security :D You would have to go back to James Clerk Maxwell's original 20 equations to see what it's all about. Okey, quaternions are kind of hard, I'll admit to that, but all in all it makes much more sense.

Like QM, doing it analytically clears away misconceptions and gives a consistent view - but it isn't exactly something you can teach to children. It's useful to be able to explain things to laypeople and the not mathematically inclined, which means tightening up the metaphors.

You have a good point, but still, it's easier to explain to children stuff that makes sense.

I teach my children that we live in a sea of energy and that you can feel it when you move. It makes much more sense to them than trying explain inertia.

I tell them that of you rotate something, it will make an energy vortex making stuff seem heavier - and I show them with a gyroscope.

Then I explain that electrons are just like little gyroscopes, but of only energy. And it all makes sense to them. They don't think it's hard at all.

Re: Why is electricity so hard to understand? (1989)

#15
post #7

Earlier quoted context omitted.

Like QM, doing it analytically clears away misconceptions and gives a consistent view - but it isn't exactly something you can teach to children. It's useful to be able to explain things to laypeople and the not mathematically inclined, which means tightening up the metaphors.

You have a good point, but still, it's easier to explain to children stuff that makes sense. I teach my children that we live in a sea of energy and that you can feel it when you move. It makes much more sense to them than trying explain inertia. I tell them that of you rotate something, it will make an energy vortex making stuff seem heavier - and I show them with a gyroscope. Then I explain that electrons are just…

Those are excellent metaphors which I've never heard anywhere else.

Re: Why is electricity so hard to understand? (1989)

#16
I think more than half the time I spent earning my EE degree has been spent unlearning the intuitive (but wrong) things that I was liberally taught. I was fortunate enough to have an exceptional Physics teacher in high school, who managed to avoid a lot of the bullshit that less fortunate students were fed; sadly, I compensated that with some of my own (misguided) self-study.

This experience also taught me to actively mistrust "intuition" and "common sense". Not that there isn't value in intuition (quite the contrary, it's priceless, from design to maintenance), but it's only useful when it rests on a solid theoretical foundation. Prior to earning that foundation, it's nothing but a (very bad) shortcut that people take because they want to feel knowledgeable, but don't want to invest the effort of going through all that math mumbo jumbo.

Re: Why is electricity so hard to understand? (1989)

#17
post #7

Earlier quoted context omitted.

Like QM, doing it analytically clears away misconceptions and gives a consistent view - but it isn't exactly something you can teach to children. It's useful to be able to explain things to laypeople and the not mathematically inclined, which means tightening up the metaphors.

You have a good point, but still, it's easier to explain to children stuff that makes sense. I teach my children that we live in a sea of energy and that you can feel it when you move. It makes much more sense to them than trying explain inertia. I tell them that of you rotate something, it will make an energy vortex making stuff seem heavier - and I show them with a gyroscope. Then I explain that electrons are just…

Hm. Children can learn the right terminology for things. Those words don't seem any easier to swallow than 'inertia' and 'charge' to me.

Re: Why is electricity so hard to understand? (1989)

#18
post #15

Earlier quoted context omitted.

You have a good point, but still, it's easier to explain to children stuff that makes sense. I teach my children that we live in a sea of energy and that you can feel it when you move. It makes much more sense to them than trying explain inertia. I tell them that of you rotate something, it will make an energy vortex making stuff seem heavier - and I show them with a gyroscope. Then I explain that electrons are just…

Those are excellent metaphors which I've never heard anywhere else.

They're reminiscent of Feynman's anecdote about his father explaining inertia:

https://www.youtube.com/watch?v=Zjm8JeDKvdc

Re: Why is electricity so hard to understand? (1989)

#19
post #15

Earlier quoted context omitted.

You have a good point, but still, it's easier to explain to children stuff that makes sense. I teach my children that we live in a sea of energy and that you can feel it when you move. It makes much more sense to them than trying explain inertia. I tell them that of you rotate something, it will make an energy vortex making stuff seem heavier - and I show them with a gyroscope. Then I explain that electrons are just…

Those are excellent metaphors which I've never heard anywhere else.

[deleted]

Re: Why is electricity so hard to understand? (1989)

#20
post #11
post #8

Could someone write the same kind of article for chemistry ? That would help me to accept the fact that I didn't get it at all :-) Oh, while you're at it : accounting :-)

The issue with chemistry is that you need to develop a "feel" (chemical intuition) for a lot of topics. A lot of chemistry taught in undergrad, like Organic, cannot always be neatly explained or solved with an equation. On top of that there seems to be as many exceptions to rules as there are rules themselves.

A lot of stuff taught in undergrad is also flat out wrong, especially anything to do with orbitals.
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