Governing Equations for Electrical Systems .Use two inter-connection laws -Kirchhoff's Voltage Law_(the loop law)KVL .The sum of voltage drop in any loop is equal to zero. The sum of the voltages around any B loop in an electrical circuit is zero. E R ean +eac +eca =O C E-iR-ir =0Governing Equations for Electrical Systems •Use two inter-connection laws –Kirchhoff's Voltage Law (the loop law) KVL •The sum of voltage drop in any loop is equal to zero. The sum of the voltages around any loop in an electrical circuit is zero.    0 AB BC CA e e e    E  iR  ir  0 E B C A i R r