Physics - What is Kirchhoff's Laws

Kirchhoff's Laws

First Law :

The algebric sum of the currrents meeting at any point in a network is zero.

Explanation :

Let the currrent

${i}_{1},{i}_{2}\, and\, {i}_{3}\,$ are meeting at junction $O\, and\, {i}_{4},{i}_{5}\,$ are passing away from the junction

from Kirchhoff's first law,

${i}_{1}+{i}_{2}+{i}_{3}={i}_{4}+{i}_{5}\, \, or$

${i}_{1}+{i}_{2}+{i}_{3}-{i}_{4}-{i}_{5}\, \, =0$ The algebric sum of the currrents meeting at any point in a network is zero.

This law is also called LAW OF JUNCTIONS

Second Law :

In any closed circuit the algebric sum of potential difference is ZERO.

Explanation :

Consider a network (closed) shown in a figure

In any closed circuit the algebric sum of potential difference is ZERO.

This is also called LOOP THEOREM

Post By : Rahul Kumar 26 May, 2020 291 views Physics