Quick Electronic Formulas Cheat Sheet, Cheat Sheet of Electronics

Download Quick Electronic Formulas Cheat Sheet and more Cheat Sheet Electronics in PDF only on Docsity! E ' IR ' P I ' PR P ' I 2R ' EI ' E 2 R E ' IZ ' P I cos1 ' P Z cos1 P ' I 2 Z cos1 ' IE cos1 ' E 2 cos1 Z pf ' Active power (in watts) Apparent power (in volt&amps) ' P EI pf ' R Z Rtotal ' R1 % R2 ' R3 % ... Rt ' R1 R2 R1 % R2 Rtotal ' 1 1 R1 % 1 R2 % 1 R3 %... f ' 1 2B LC , or f ' 159.2( LC L ' 1 4B2f 2C , or L ' 25,330( f 2C C ' 1 4B2f 2L , or C ' 25,330( f 2L G ' 1 R (for D&C circuit) G ' R R 2%X 2 (for A&C circuit) XC ' 1 2BfC C ' 1 2BfXC XL ' 2BfL L ' XL 2Bf Z ' R 2%(XL&XC) 2 (for series circuit) Z ' RX R 2%X 2 (for R and X in parallel) Q ' XL R or XC R 2-7.1 ELECTRONIC FORMULAS Ohm's Law Formulas for D-C Circuits. Ohm's Law Formulas for A-C Circuits and Power Factor. In the above formulas 1 is the angle of lead or lag between current and voltage and cos 1 = P/EI = power factor or pf. Note: Active power is the "resistive" power and equals the equivalent heating effect on water. Voltage/Current Phase Rule of Thumb Remember "ELI the ICE man" ELI: Voltage (E) comes before (leads) current (I) in an inductor (L) ICE: Current (I) comes before (leads) Voltage (E) in a capacitor (C) Resistors in Series Two Resistors in Parallel Resistors in Parallel, General Formula Resonant Frequency Formulas *Where in the second formula f is in kHz and L and C are in microunits. Conductance Reactance Formulas Impedance Formulas Q or Figure of Merit