Electrical Engineering ⇒ Topic : Kirchhoffs Laws
|
Maninder
| |
Second Law (Mesh or Voltage Law). It states as follows: "The sum of e.m.fs. (rise of potential.) around any closed loop of a circuit equals the sum of the potential drops in that loop". Considering a rise of potential as positive (i- ve) and a drop of potential as negative (- ve), the algebraic sum of potential differences (voltages) around a closed loop of a circuit is zero ∑E - ∑IR drops = 0 (around closed loop) i.e. ∑E=∑IR or ∑ Potential rises = ∑ potential drops | |
| |
Mason
| |
Kirchhoff's Voltage Law (KVL). Kirchhoff's voltage law for a.c.circuits may be stated as under : In any closed electric circuit, the phasor sum of voltage drops plus the phasor sum of voltage rises is zero. By convention, a voltage rise is given a positive sign and a voltage drop is assigned a negative sign. Remember that passing through a source or impedance from + to indicates a voltage drop,while passing through it from to + indicates a voltage rise. | |
| |
!! OOPS Login [Click here] is required for more results / answer