What is Kirchhoffs Current Law (KCL)?
What is Kirchhoffs Voltage Law (KVL)?
Electrical Engineering ⇒ Topic : Kirchhoffs Laws
What is Kirchhoffs Current Law (KCL)? What is Kirchhoffs Voltage Law (KVL)? |
Mason
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Kirchhoff's laws for d.c. circuits can also be applied to a.c. circuits with a slight modification. In d.c. circuits, we take algebraic sum of voltages and currents whereas in a.c. circuits, we take phasor sum of voltages and currents. Kirchhoff's Current Law (KCL):- Kirchhoff's cun-ent law for a.c. circuits may be stated as under The phasor sum of the currents entering a point in an a.c. circuit is equal to the phasor sum of the currents leaving that point The term `phasor sum' is used because we are dealing with alternating currents. This law is based on the principle of conservation of charge. 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. | |
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