# Electrical Topics

> ELECTRON CHARGE : 1.

602*10^-19 coulomb > ELECTRON MASS : 9.108*10^-31 kg > ELECTRIC CURRENT : flow of electron known as electric current (3) temperature of conductor : R ? t (4) area of conductor : R ? 1/a > EFFECT OF TEMPERATURE ON RESISTANCE : CONDUCTOR : R ? T {text:bookmark-start} {text:bookmark-start} Example of {text:bookmark-end} {text:bookmark-end} conductor : copper, aluminium SEMI CONDUCTOR : R ? 1/T Example of semi conductor : carbon , silicon , germanium INSULATOR : R ? 1/T Example of insulator : > OHM??™S LAW : R = V/I > POWER : work/time ??“ joule 1 micro watt = 10^-6 watt 1 milli watt = 10^-3 watt 1 kilo watt = 10^3 watt 1 mega watt = 10^6 watt > ENERGY : power * time > CONNECTION OF RESISTANCES IN SERIES : R = R1 + R2 + R3 + R4??¦??¦??¦??¦.. > CONNECTION OF RESISTANCES IN PARALLEL : 1/R = 1/R1 + 1/R2 + 1/R3 + 1/R4??¦??¦.

> ACTIVE ELEMENT : EMF , CURRENT > PASSIVE ELEMENT : RESISTANCE > NETWORK : > NODE : > BRANCH : > KIRCHHOFF??™S CURRENT LAW : > KIRCHHOFF??™S VOLTAGE LAW : > SUPER POSITION THEOREM : > MAGNETIC FIELD : > FLUX DENSITY : B = ?/A ??“ wb/m^2 > FLEMING??™S LEFT HAND RULES : F = B I l > MAGNETOMOTIVE FORCE : > RELUCTANCE : > CONDUCTIVITY : > PERMEABILITY : > DIAMAGNETIC : > PARAMAGNETIC : > FERROMAGNETIC : > PERMEANCE : > LEAKAGE FLUX : > FRINGING : > FARADAY??™S LAW : > CONDITION FOR PRODUCTION OF EMF : > DYNAMICALLY AND STATICALLY INDUCED EMF : > FLEMING??™S RIGHT HAND RULES : > MUTUALLY INDUCED EMF : > PERMITTIVITY : > COULOMB??™S LAW : > ELECTRIC FLUX : > CAPACITOR : > CAPACITANCE : C = Q/V 1?µF = 10^-6 F 1?µ?µF = 10^-12 F 1 Nf = 10^-9 F > TYPES OF CAPACITORE : > CAPACITORS IN SERIES : 1/C = 1/C1 + 1/C2 + 1/C3 + 1/C4??¦??¦??¦??¦.. > CAPACITORS IN PARALLEL : C = C1 + C2 + C3 + C4??¦??¦??¦??¦??¦??¦??¦.

> CYCLE : > TIME PERIOD : > FREQUENCY ; > INSTANTANEOUS VALUE : > MAXIMUM VALUE : > RMS VALUE : 0.707 Im > AVERAGE VALUE : 0.637 Im > FORM FACTOR : 1.11 > PEAK,CREST & AMPLITUDE FACTOR : 1.414 > A.C.

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THROUGH PURE RESISTANCE : > A.C. THROUGH PURE CAPACITOR : > POWER FACTOR : > APPARENT POWER : > ACTIVE POWER : > REACTIVE POWER : > Q FACTOR OF A COIL : > SERIES RESONANCE : > ADVANTAGES OF THREE PHASE SYSTEM OVER SINGLE PHASE SYSTEM : {text:bookmark-start} {text:bookmark-end}