- #1

songoku

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I know at balanced condition, the current flowing through galvanometer = 0 and R

_{1}. R

_{x}= R

_{2}. R

_{3}

What I want to ask is how to analyze the circuit until we can conclude the current will be zero. I have learned about Kirchhoff's 1st and 2nd law and also about potential divider. I am guessing there is something to do with potential divider. By changing the value of R

_{2}, we can get V

_{D}= V

_{B}so no current flowing through galvanometer but how to do the calculation / analysis? Can we do it by using Kirchhoff's 1st and 2nd law and potential divider or we need something else beyond high school scope?

Thanks

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