# Formulas to Memorize:

• -Circle Area = π r2
• -Series -Amps = Same
• -Parallel – Volts = Same
•                 – 1/Rt = 1/R1 + 1/R2 + etc.
• -RPM = 120xHz/Poles
• -1øVD = 2KIL/CM
• -3øVD = /3KIL/CM
• -Short-Circuit Amps (SCA) = Amp / %Z/100

ALSO:

• HP = KW/746

# Formula Wheel

Used for circuits of VDC or VAC with Unity Power Factor 4 Quadrants divided into 12 Total

## Formula Wheel Memorization Tool

Formula Wheel Memorization Tool
* = 2 EAR PIE
√ = 2 PRPR Ib4E w/’s
÷ = 4 Eiri Peep Irie
x² = 4 PRPR Vertical-Inverted RP’s
See Formula Wheel Memorization Tool below

Remember this column: Use 1st Column as a reminder to remember this column: Now remember the Details:
* = 2 EAR PIE E=I*R & P=I*E
√ = 2 PR PR I = √ P / R

I before E and

I has slants (I, √, /)

E = √ PR
÷ = 4 Eiri Peep Irie E = P ÷ I
I = E ÷ R
R = E ÷ I
I = P ÷ E
x² = 4 PRPR P = R *
R = P ÷
P = ÷ R
R = ÷ P

• I = E / R
• Used to find current flowing through each resistor
• E is VD across each resistor, not voltage source
• Determines current of each parallel branch
• I=Es/Rt
• Es = power supply voltage
• Rt = Total circuit resistance
• P = I2R
• Power as a result of current flowing through a resistance
• Power can be calculated through P = I2R or Resistance Law of Proportion

# Ohms Law Formula Circle

• Ohms Law is opposition to current flow
• Relationship between a circuits current intensity (I), electro-motive force (E), and resistance (R)
• Current flow equals Voltage divided by Resistance
• Current is inversely proportional to Resistance
• When Resistance decreases, with Voltage constant, Current increases & vice versa
• I is directly proportional to E, & inversely proportional to R # PIE Formula Circle

• Demonstrates relationship between power, current, and voltage 