ELECTRONIC FORMULAS - TSCM

1 E'IR'PI'PRP'I2R'EI'E2RE'IZ'PIcos1'PZcos1 P'I2 Zcos1'IEcos1'E2cos1 Zpf'Activepower(inwatts)Apparentpower(in volt&amps)'PEIpf'RZRtotal'R1%R2'R3%..Rt' R1R2R1%R2 Rtotal'11R1%1R2%1R3%..f'12 BLC,orf' (LCL'14B2f2C,orL'25,330(f2CC'14B2f2L,orC '25,330(f2LG'1R(forD&Ccircuit)G'RR2%X2(f orA&Ccircuit)XC'12 BfCC'12 BfXCXL'2 BfLL'XL2 BfZ'R2%(XL&XC)2(forseriescircuit)Z'RXR2% X2(forRandXinparallel)Q' FORMULASOhm's Law FORMULAS for D-C 's Law FORMULAS for A-C Circuits and Power the above FORMULAS 1 is the angle of lead or lag between current and voltage and cos 1 = P/EI = power factor or : Active power is the "resistive" power and equals the equivalent heating effect on Phase Rule of ThumbRemember "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 SeriesTwo Resistors in Parallel Resistors in Parallel, General FormulaResonant Frequency FORMULAS *Where in the second formula f is in kHz and L and C are in FormulasImpedance FormulasQ or Figure of MeritDCBlockedDCPassesHigh FreqBlockedHigh FreqPassesDCLow FreqACHighFreqInductor *Capacitor *ResisterPassBlockAttenuateAttenuate *Attenuate *AttenuateAttenuatePassBlock* Attenuation varies as a function of the value of the each device and the frequency"Cartoon" memory aidPeakEffectiveAverageTIMEWye (Y) or ResponseSinusoidal Voltages and CurrentsEffective value = x peak value[Also known as Root-Mean Square (RMS))))]

2 Value]Half Cycle Average value = x peak valuePeak value = x effective value Effective value = x average valueThree-phase AC Configurations(120E phase difference between each voltage)If the connection to a three phase AC configuration is miswired, switching any two of the phases will put it back in the proper power for ships commonly uses the delta configuration, whilecommercial ELECTRONIC and aircraft applications commonly use the Code for House Wiring:PURPOSE:Color Code for Chassis Wiring:Black or redHOTRedWhiteNEUTRAL (Return)WhiteGreen or bareGROUNDB lackColor Code for Resistors:First and second band:Third bandFourth band (and third band # of zeros if not gold/silver) color3 Orange8 Gray4 Yellow9 WhiteThe third color band indicates number of zeros to be added after figures given by first two color bands.

3 But if thirdcolor band is gold, multiply by and if silver multiply by Do not confuse with fourth color-band that indicatestolerance. Thus, a resistor marked blue-red-gold-gold has a resistance of ohms and a 5% tolerance.