Kirchoff's law is basically used for solving da complex electrical circuits which involve many resistances, loops n junctions.

   Dis is how it goes

1. JUNCTION RULE:  current is distributed in all da branches joining da junction.

 

2. LOOP RULE:  this states dat da total potential difference across a closed cirular loop is 0.

   whenever v consider a loop then da direction of current i should b frm + end to da -ve end of da battery. (current moves frm higher potential point to lower potential point)

 SIGN CONVENTIONS

    In a Battery - to + is taken to be positive +Emf & - to + is (- emf)negetive.

   

     In a Resistor if i current flows frm higher to lower potential then take V =  - ir

        and if current is frm lower to higher potential then take V =  + ir..