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Windows 7: Ohm's Law

24 Sep 2013   #11
derekimo

Microsoft Community Contributor Award Recipient

 
 

Quote   Quote: Originally Posted by Britton30 View Post
Ohm's law would be easier if it used
W=watts
V=volts
A=amps
O=resistance
The "I" and "P" and always confuse me.
And just to add to the confusion is the PIE chart,


Attached Images
Ohm's Law-ohmspie-450x450.gif 
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24 Sep 2013   #12
Britton30
Microsoft MVP

Windows 7 Ultimate X64 SP1
 
 

Gee, thanks Derek.
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24 Sep 2013   #13
derekimo

Microsoft Community Contributor Award Recipient

 
 

Quote   Quote: Originally Posted by Britton30 View Post
Gee, thanks Derek.
Thankfully, that's not in common use anymore.

Does make for a confusing chart,

P = W

I = A

E = V
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.

24 Sep 2013   #14
A Guy

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium x64 SP1
 
 

Years ago, Native American Indians used to roam the plains of the United States. These Indians would look across the plains, and see all kinds of animals. They would see rabbits running across the field, and eagles soaring in the sky. Now, picture things from the Indian's stand point - he sees the Eagle flying over the Rabbit:

Say to yourself Indian equals Eagle over Rabbit.

Now just use the first letter of each word: I = E over R

However, from the Rabbit's point of view, he sees things a little differently. The Rabbit looks out and sees the Eagle flying over the Indian.

Say to yourself Rabbit equals Eagle over Indian.

Now just use the first letter of each word: R = E over I

Finally, the Eagle up in the sky sees both the Indian and the Rabbit standing on the ground together.

Say to yourself Eagle equals Indian and Rabbit together.

Now just use the first letter of each word: E = IR



A Guy
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24 Sep 2013   #15
derekimo

Microsoft Community Contributor Award Recipient

 
 

That's a good one Bill.
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25 Sep 2013   #16
Britton30
Microsoft MVP

Windows 7 Ultimate X64 SP1
 
 

Very good association Bill, deserves a rep.
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25 Sep 2013   #17
Northernsoul55

Microsoft Community Contributor Award Recipient

Windows 7 Professional 64bit
 
 

You don't need all those charts really , you just need to be able to
transpose the formula using basic algebra:

Example:

Transpose the formula V = I x R, to make I the subject.


V=I x R (Divide both sides by R)


V=I x R
_ ___
R R

The R's on the right cancel each other out.

So you get:

V=I
_
R

Then flip the formula round to read:

I=V
_
R

To get to I just simply "times" both sides by R

R x I= V x R
_
R

The R's cancel each other out and you get to:

I = V X R

It is same method if you want to make V the subject.

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25 Sep 2013   #18
Britton30
Microsoft MVP

Windows 7 Ultimate X64 SP1
 
 

What's algebra?
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25 Sep 2013   #19
Bongo

Microsoft Community Contributor Award Recipient

Win 7 Pro x64 / Win 10 Pro
 
 

Ohm's Law-image0011.jpg


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25 Sep 2013   #20
A Guy

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium x64 SP1
 
 



A Guy
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