ACCORDING TO KIRCHOFF'S LOOP RULE ,HOW DO WE KNOW THAT HOW MANY LOOPS ARE TO BE CHOOSEN ? AND IN WHAT WAY THEY ARE TO BE CHOOSEN ? 

Hi,

Kirchhoff’s loop rule states that

“ The directed sum of electrical potential difference in a closed loop is zero “

 

The number of loops equation (loops) depends upon the number of unknown variable. You can apply this law to any closed loop. So, in a given diagram of circuit you can obtain loop equation depending upon the number of unknown variables.

 

Loops are chosen in such a way that equation obtained solves the purpose of determining the unknown variables.

 

Hope this helps,

Good luck.