Need a good link to learn V=IxR for my grandaughter

[yungman]

Hi

My grand daughter is a senior in HS, She even took AP physics and calculus, BUT she never learn simple electrical stuff, like the basic V= I x R.

I want suggestion of some good links she can read about very basic electricity/electronics starting with V = I x R. Of cause I know all those, but being long time engineer and all, I don't trust myself to pick an introduction article as they all look the same at this point. So I need someone here that deal with teaching young minds to pick some links for me. Something that is more interesting.

Thanks

 

[jedishrfu]

There are many video clips on youtube to choose from. I found these two that look pretty good:

 

[yungman]

Thanks

I picked the first one and I have one I found. I am good.

Have a nice day.

 

[fresh_42]

We abbreviate voltage with a U. Don't ask me why, but it helps since URI is a swiss Kanton.

 

[jedishrfu]

To expand on @fresh_42's comment:

Uri is: https://en.wikipedia.org/wiki/Canton_of_Uri

 

[fresh_42]

We abbreviate voltage with a U. Don't ask me why, but it helps since URI is a swiss Kanton.

I think I figured out why. If you abbreviate voltage with a V, then you get equations like V=5V that nobody really wants. U=5V is better.

 

[Baluncore]

We abbreviate voltage with a U. Don't ask me why, but it helps since URI is a swiss Kanton.

Ohm was born in Erlangen, Germany, just 360 km from Uri, Switzerland.

U, V and W are the symbols for the line voltages on a 3-PH power supply.

 

[Tom.G]

Here in the States, we often use E=IR, E for Electromotive force.

 

[jedishrfu]

I think I figured out why. If you abbreviate voltage with a V, then you get equations like V=5V that nobody really wants. U=5V is better.

Although in the US we use lowercase units of measure so the equation would be V=5v

 

[Baluncore]

Although in the US we use lowercase units of measure so the equation would be V=5v

5 V with a space would be more correct in SI. The unit volt is lower case when spelled out, named after Volta (capitalised), while the symbol is capitalised, hence V.
For units not named after people, the unit name and symbol are both lower case, eg; metre, m.

 

[fresh_42]

Although in the US we use lowercase units of measure so the equation would be V=5v

Not according to Wikipedia:
https://en.wikipedia.org/wiki/Volt

 

[Vanadium 50]

I am not sure how much to trust Wikipedia, but I looked at my battery packaging and see both V and v.

And if the granddaughter wasn't confused before, I am sure she is after reading this thread.

 

[berkeman]

Although in the US we use lowercase units of measure so the equation would be V=5v

Not on my DvM!

 

[Vanadium 50]

That's because you didn't buy a DvM.

 

[berkeman]

That's because you didn't buy a DvM.

I'm cheap. I didn't want to pay extra for the US model...

 

[fresh_42]

I can't help but I always have to think about current. Do you really speak of 16 a fuses? This is a terrible convention. And 2 c?

 

[Baluncore]

A 1 fF capacitor.

 

[DrClaude]

A 1 fF capacitor.

FFS!