Ohms Law Pie Chart_What's your memory Aid?

Status
Not open for further replies.
junkhound said:
yeah, only one ah remember fer sur is upside down triange dot B = zero... another may be triangle X something = zero also :(
Click to expand...
Very close. Leaving the details of math symbolism out for the moment:
1. The divergence of E at a point is related to the charge density at that point, and
2. Since there are no magnetic monopoles (the equivalent of magnetic charge), the divergence of B is zero.
(Where E is used to denote the electric field vector.)
 
Ok, here's my memory aid

Ok, here's my memory aid

Hi all,

Nice to see the tips.
One thing I would like to know. If you have the EAR-PIE circles drawn out (E=I/R & P=I/E), when you cover one up how to you determine correct math with the 2 square roots and 4 squared formulas? That gap in my knowledge is why I am using a memory tool.

So here is mine, as I wrote earlier (only simpler know).
All I need to write down are these four symbols and I've got it.
Step 01:
*
√
/
■
Why does this work for me? Through some repetitive writing (not typing), these 4 symbols are easy memory aid triggers for me. I'll document my steps below, from memory, then I'll insert pie-chart.jpg and we can see if I got this one correct. I've done this many times by now with one mistake (put the E in the P and the P in the E!)
Step 02:
* = 2
√ = 2
/ = 4
■ = 4
Step 03:
* = 2 EAR PIE
√ = 2 PR PR and I-b4-E with slants
/ = 4 Eiri Peep Irie (like 'eeire peep irie')
■ = 4 PR PR
Step 04:
* = 2 EAR PIE
√ = 2 I = √P/R (I-b4-E with slants) & E = √PR
/ = 4 Eiri Peep Irie (like 'eeire peep irie')
■ = 4 PR PR
Step 05:
* = 2 EAR PIE
√ = 2 I = √P/R (I-b4-E with slants) & E = √PR
/ = 4 Eiri Peep Irie (like 'eeire peep irie')
■ = 4 P = R * I²
R = P / I²
P = E² / R
R = E² / P
Step 06:
* = 2 EAR PIE
√ = 2 I = √P/R (I-b4-E with slants) & E = √PR
/ = 4 Eiri Peep Irie (like 'eeire peep irie')
■ = 4 P = R * I²
R = P / I²
P = E² / R
R = E² / P
Eiri Peep Irie:
E = P / I
I = E / R
R = E / I
I = P / E
Notice with the two symbols written out at length ('/' and '■'), all use division except for the top one
--
That's it, all done, all formulas are done and one could stop here if you like.
The last step I've been doing is draw out the circle, add P/I/E/R in the center, draw the pie-segment lines, and use the formulas above to fill in the circle.
Now, let's check this picture I've just uploaded.

View attachment 20111

E=IR & P=IE
I = √P/R & E = √PR
P = RI²
R = P / I²
P = E² / R
R = E² / P
E = P / I
I = E / R
R = E / I
I = P / E
All looks good.
--
So to recap, here's what I actually remember:
* EAR PIE
√ the 1st of 2 PR PR with I before E & I has all the slants
/ Eiri Peep Irie (this is the hardest part to remember for me, it's like a horror-chicken-rasta)
■ the 2nd PR PR, drawn vertical, & inverted to two RP RP's (simple pattern memory)
--
Anyway, some may say I have way overdone this but it works for me and now that I've done this, I should remember for good. That's how my brain works.
Thought I'd share.
I'm curious what other tricks anyone is using.
Cheers,
Phil
 
pcsailor said:
Hi all,

Nice to see the tips.
One thing I would like to know. If you have the EAR-PIE circles drawn out (E=I/R & P=I/E), when you cover one up how to you determine correct math with the 2 square roots and 4 squared formulas? That gap in my knowledge is why I am using a memory tool.

So here is mine, as I wrote earlier (only simpler know).
All I need to write down are these four symbols and I've got it.
Step 01:
*
√
/
■
Why does this work for me? Through some repetitive writing (not typing), these 4 symbols are easy memory aid triggers for me. I'll document my steps below, from memory, then I'll insert pie-chart.jpg and we can see if I got this one correct. I've done this many times by now with one mistake (put the E in the P and the P in the E!)
Step 02:
* = 2
√ = 2
/ = 4
■ = 4
Step 03:
* = 2 EAR PIE
√ = 2 PR PR and I-b4-E with slants
/ = 4 Eiri Peep Irie (like 'eeire peep irie')
■ = 4 PR PR
Step 04:
* = 2 EAR PIE
√ = 2 I = √P/R (I-b4-E with slants) & E = √PR
/ = 4 Eiri Peep Irie (like 'eeire peep irie')
■ = 4 PR PR
Step 05:
* = 2 EAR PIE
√ = 2 I = √P/R (I-b4-E with slants) & E = √PR
/ = 4 Eiri Peep Irie (like 'eeire peep irie')
■ = 4 P = R * I²
R = P / I²
P = E² / R
R = E² / P
Step 06:
* = 2 EAR PIE
√ = 2 I = √P/R (I-b4-E with slants) & E = √PR
/ = 4 Eiri Peep Irie (like 'eeire peep irie')
■ = 4 P = R * I²
R = P / I²
P = E² / R
R = E² / P
Eiri Peep Irie:
E = P / I
I = E / R
R = E / I
I = P / E
Notice with the two symbols written out at length ('/' and '■'), all use division except for the top one
--
That's it, all done, all formulas are done and one could stop here if you like.
The last step I've been doing is draw out the circle, add P/I/E/R in the center, draw the pie-segment lines, and use the formulas above to fill in the circle.
Now, let's check this picture I've just uploaded.

View attachment 20111

E=IR & P=IE
I = √P/R & E = √PR
P = RI²
R = P / I²
P = E² / R
R = E² / P
E = P / I
I = E / R
R = E / I
I = P / E
All looks good.
--
So to recap, here's what I actually remember:
* EAR PIE
√ the 1st of 2 PR PR with I before E & I has all the slants
/ Eiri Peep Irie (this is the hardest part to remember for me, it's like a horror-chicken-rasta)
■ the 2nd PR PR, drawn vertical, & inverted to two RP RP's (simple pattern memory)
--
Anyway, some may say I have way overdone this but it works for me and now that I've done this, I should remember for good. That's how my brain works.
Thought I'd share.
I'm curious what other tricks anyone is using.
Cheers,
Phil
Click to expand...
Begads....I'd never remember all of that !
But I'm pleased it works for you.
 
pcsailor said:
If you have the EAR-PIE circles drawn out (E=I/R & P=I/E), when you cover one up how to you determine correct math with the 2 square roots and 4 squared formulas?
Click to expand...
I don't bother, I just go ahead and do two math problems instead. Just as fast and less error chance.

And, it's E=I*R & P=E*I, not E=I/R & P=I/E.
 
Personally, all I have to remember is V=IR and P=VI. All the rest is just simple algebraic rearrangement of those two equations. If I forget that P=I^2R, I can derive it in a few seconds.
 
mine is simple--I remember E=I(R) and P=I(E) and from there I can do any of the others--Juast a matter of bouncoing back and forth
 
Status
Not open for further replies.
Top