Kirchhoff developed two reasonably simple equations we now call Kirchhoff’s current law (KCL) and Kirchhoff’s voltage law (KVL). If you combine KCL, KVL, Ohm’s law and linear algebra, you can systematically find all the voltages and currents in a circuit that has only resistors and power sources.
Q. What is the difference between loop and mesh?
A loop is any closed path through a circuit where no node more than once is encountered. A mesh is a closed path in a circuit with no other paths inside it.
Table of Contents
- Q. What is the difference between loop and mesh?
- Q. How can we solve KVL and KCL problems?
- Q. What is the purpose of KCL and KVL?
- Q. What is the difference between application of KVL and KCL in AC and DC circuit?
- Q. What is another name for KVL and KCL?
- Q. Is Kvl valid for AC?
- Q. What are the limitations of KVL and KCL?
- Q. Is Kvl valid for open circuit?
Q. How can we solve KVL and KCL problems?
The overall equation for the above circuit is:
- E1-E2 = i1R1 + i2R2 – i3R3 – i4R4
- Solution:
- Now, Apply KVL on Mesh ABC, 20V are acting in clockwise direction.
- Multiplying equation (1) by 3;
- i1 = 72/38 = 1.895 Amperes = Current in 10 Ohms resistor.
- Substituting this value in (1), we get:
- 4i2 = 20 – 18.95.
Q. What is the purpose of KCL and KVL?
These relationships are determined by Kirchhoffs laws such as KVL and KCL. These laws are used to determine the impedance of the complex network or equivalent electrical resistance and the currents flowing in the several branches of the n/w.
Q. What is the difference between application of KVL and KCL in AC and DC circuit?
Kirchhoff’s Voltage Law (KVL) Kirchhoff’s voltage law states that the algebraic sum of the voltages around any loops in a circuit is always zero. Kirchhoff’s Current Law (KCL) Kirchhoff current law states that the algebraic sum of all currents entering a node of a circuit is always zero.
Q. What is another name for KVL and KCL?
These two rules are commonly known as: Kirchhoffs Circuit Laws with one of Kirchhoffs laws dealing with the current flowing around a closed circuit, Kirchhoffs Current Law, (KCL) while the other law deals with the voltage sources present in a closed circuit, Kirchhoffs Voltage Law, (KVL).
Q. Is Kvl valid for AC?
2 Answers. Strictly speaking, Kirchoff’s circuit laws are not valid in AC circuits. However they are often good enough for engineering work. That in turn means that the change in current causes a change in the magnetic field, which is manifested within the electric potential.
Q. What are the limitations of KVL and KCL?
Disadvantages of Kirchoff’s Law KCL and KVL are not good for high frequency AC circuits. KCL is valid only if the total electric charge is constant in the circuit. KVL is based on the assumption that there is no changing magnetic field within the closed circuit.
Q. Is Kvl valid for open circuit?
“KVL is applicable in open circuit too.” How can this statement be justified? If you look at an open circuit as a circuit with an infinite resistance, you can apply KVL without ambiguity. Suppose your source is 10 volts. Leads are taken out from the positive and negative ends of the source and left open.
