Resistance relation in parallel circuit In parallel circuit, what is the relationship between the resistance of each branch and the total resistance? Why!
In parallel circuit, the voltage of each branch is equal, the sum of current is the total current, R1 R2. RN parallel circuit is set the total resistance as R, the total current is iu1 = U2 =. = UN = u (1) I1 + I2 +. + in = I (2) (2) both sides of the formula divide by u at the same time, combine (1) have I1 / U1 + I2 / U2 +... + in / UN = I / u, that is 1 / R1 + 1 / r2 +... +
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