1. The problem statement, all variables and given/known data 2. Relevant equations 1/R= 1/R1 + 1/R2 +... I1= R2/R1 x I 3. The attempt at a solution I chose B because I thought that since total resistance in the branch of variable resistor has increased, the branch with ammeter will get a greater share of current. Since I'm not too sure about it because the overall increase in resistance does cause a drop in main current, I put in some random values of R and V , and I still get an increase in ammeter reading. So why is the answer C?