Kirchhoff’s Circuit Laws

by DC-Corona
Kirchhoff’s Circuit Laws

KIRCHHOFF’S LAW

Kirchhoff’s law :- it is the law which consists of two basic laws . These two laws are Kirchhoff’s Voltage Law (KVL) and Kirchhoff’s Current Law (KCL).

First law is Kirchhoff’s Current Law KCL and it is also  known as Junction law.

This rule basically says that a incoming current to a junction is equal to a outgoing current. The sum of all incoming current is equal to sum of all out going current, which is 0 our output is 0. Let us assume with the examples.

 

Image From :- https://www.electricaltechnology.org/

So according to the above diagram

I1 + I5 = I2 + I3 + I4 = 0

Incoming current = outgoing current = 0.


Second law is Kirchhoff’s voltage law (KVL) and it is also known as loop law.

This law states that the sum of voltage drop ∆v across any circuit element that form a closed loop is 0.

OR

The algebraic sum of all voltage around a closed path at any instant is zero.

Means to say that ÷ ∆v1 + ∆v2 + ……………….. = 0

If you are running in a direction of current and there is resistance then there is a voltage drop . If current flow in opposite direction to the current then their will be addition . Let us figure it out with the above diagram.

Let suppose that potential of A is VA so.

VA + (-I1R1) + (-I2R2) + E1 + I3R3 + (-I4R4) =VA

In this we started from VA and end at VA

So we cancel VA of both side

We get  -I1R1 - I2R2 + E1 + I3R3 - I4R4 = 0

Hope You Learned Something From This Article !!!!

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