Network Theorems
December 8, 2016KCL : ΣI = 0 KVL: ΣV = 0 Superposition theorem: $I_L = I’_L + I”_L$ No specific formulae in... View Article
Categories for 1st Year Electrical
DC Circuits
December 8, 2016$$ I_2 = {R_1}/{(R_1 + R_2)} I $$ OR $$ I_1 = {R_2}/{(R_1 + R_2)} I $$ Delta to Star... View Article
Polyphase AC Circuits
December 8, 2016(1) Balanced star load: Line voltage = √3 phase voltage Line current = phase current Power Relations: Apparant Power: S... View Article
Single Phase AC Circuits
December 8, 2016(1) Reactance: Inductive Reactance ($X_L$) = ωL = 2πfL Capacitive Reactance ($X_C$) = 1/{ωC} (2) Impedance (Z): Z = R... View Article
AC Fundamentals
December 8, 2016$$ v(t) = V_m sin(2πf_0 t) $$ $$ i(t) = I_m sin(2πf_0 t) $$ $$ I_{rms} = 0.707 I_m =... View Article
Electrostatics
December 8, 2016(1) Coulomb’s inverse square law: $$ F = {q_1 q_2}/{4π ε_0 ε_r r^2} $$ $ε_0 = 8.854 x 10^{-12} =$... View Article
Single Phase Transformers
December 8, 2016(1) Induced voltage: $$ E = 4.44 f ϕ_m N $$ (2) Ratios: Voltage ratio: $ V_1/V_2 $ Transformation ratio:... View Article
Electromagnetic Induction
December 8, 2016(1) Induced EMF: $ e = – N dϕ/dt $ volts e = B x l x v volts (2)... View Article
Electromagnitism
December 8, 2016(1) Coulumb’s Law: $$ F = K {m_1 m_2}/{d^2} $$ (2) Magnetic Flux Density: $ B = ϕ / A... View Article
Elementary Concepts
December 8, 2016(1) Resistance (R) & Resistivity (ρ): R = 1/G where, G = Conductance $$R = ρ l/a$$ l = length... View Article