Circuit Formulas

Front 1

What is the formula for solving capacitance in a series and parallel circuit?

Back 1

Series: Ct= 1/(1/C1 + 1/C2 + 1/Cn) OR Ct= (C1 x C2)/(C1 + C2)

Parallel: Ct= C1+C2+Cn

Front 2

When solving capacitors it is the opposite of what other component?

Back 2

Resistors

Front 3

The total for inductance in a parallel and series circuit is the same as what component?

Back 3

Resistors

Front 4

What is the formula for inductance in parallel and series?

Back 4

Series: Lt= L1+L2+Ln

Parallel: 1/Lt= 1/L1+1/L2+1/Ln OR Lt= 1/ (1/L1+1/L2+1/Ln) OR Lt= (L1xL2)/(L1+L2)

Front 5

What are the different formulas for POWER?

Back 5

P= I^2R, P= IxE, P= E^2/R,
Pt= Sqr. of (P)Rt^2+(P)Ct^2, Pt= Sqr of (P)Rt^2+(P)Lt^2, Pt= Sqr. of (P)Rt^2+(Pl-Pc)^2

Front 6

What are the different formulas for VOLTAGE?

Back 6

E= P/I, E= IxR, E= Sqr. Root of PxR, E= Sqr of (E)Rt^2+(E)Ct^2; E= Sqr of (E)Rt^2+(E)Lt^2; E= Sqr of (E)Rt^2+(El-Ec)^2

Front 7

What are the different formulas for Resistance?

Back 7

R= E/I, R= E^2/P, R= P/I^2

Front 8

What are the different formulas for Current?

Back 8

I= E/R, I= P/E, I= Sqr. root of P/R; I= Sqr of (I)Rt^2+ (I)Ct^2; I= Sqr of (I)Rt^2+ (I)Lt^2; I= Sqr of (I)Rt^2+((I)Lt-(I)ct)^2

Front 9

What are the formulas for Xc (capacitive reactance)?

Back 9

Xc= 1/(2(pie)fC; Xc= Xc1+Xc2+Xcn

Front 10

What are the formulas for Z (impedance)in a series and parallel?

Back 10

Series: Z= Sqr of R^2+Xc^2; Z= Sqr of R^2+Xl^2; Z= Sqr of R^2+(Xl-Xc)^2

Parallel: Z= Ea/It

Front 11

Formulas for Transformers

Back 11

%Effieciency= Ps/Pp x 100;
Pp=PS;
Np/Ns=Ep/Es <--TURNS

Front 12

Formulas for Time Constants

Back 12

1 TC=RC;
1 TC=L/R

Front 13

Formulas for Resonance

Back 13

Xl=Xc; fr=1/(2(pie)Sqr. rt. of LC; BW=fr/Q; Q=Xl/R (SERIES); Q=R/Xl (PARALLEL)

Front 14

Formulas for Sine Waves

Back 14

RMS= .707 x PEAK;
AVG= .636 x PEAK;