In the following network, the current through galvanometer will

Step-by-step solution

Consider the following diagram: As the bridge is not balanced so the current will flow through wire. Consider the loop PSQP: -(I-i)-i_g G+4 i=0 -I-i_g G+5 i=0 ---(1) Now, consider the loop SQRS: aligned & -i_g G-4 (i+i_g )+3 (I-i-i_g )=0 & +3 I-i_g(G+7)-7 i=0 --(2) aligned On considering following operation, 7 eq ^ n (1)+5 eq ^ n (2) aligned & 4 I-i_g(12 G-35)=0 & i_g= 4 I (12 G+35) aligned Therefore, the current will flow through from S to Q , as the value of I and hence, the value of i_g will be positive. As, G i