Before revision: The balance equation of this bridge is given by the equation In a practical bridge circuit, the ratio of R′1 to R′2 is arranged to be the same as the ratio of R1 to R2 (and in most designs, R1 = R′1 and R2 = R′2).
After revision: All About CircuitsThe balance equation of this bridge is given by the equation In a practical bridge circuit, the ratio of R′1 to R′2 is arranged to be the same as the ratio of R1 to R2 (and in most designs, R1 = R′1 and R2 = R′2).