Network theorems objective questions with explanations

Network theorems objective questions with explanations For ESE,GATE,SSC,RRB,& other exams

Q no 1 . kirchhoff 's current law states that

             a ) net current flow at the junction is positive

             b ) algebraic sum of the currents meeting at the junctions zero

             c ) no current can leave the junction without some current entering it

             d ) total sum of currents meeting at the junction is zero

explanations

                   answer ;  b ) algebraic sum of the currents meeting at the junctions zero

Q no 2 . According to kirchhoff 's voltage law ,the algebraic sum of all IR drops and emfs in any                         closed loop of a network is always

                 a ) negative

                 b ) positive

                 c ) determined by battery emfs

                 d ) zero

explanations

                   answer ; d ) zero