How to derive the formula step- wise

Asked by Pooja Kulshrestha | 7th Jul, 2011, 04:41: AM

Expert Answer:

Resistance in Parallel 




If the resistance are in parallel, the potential difference across each is the same, but the current is not. Then,

I = I1 + I2 + I3



Since charge is not accumulated at a point,



where Rp is the equivalent resistance of the combination. Therefore,



For the special case of only two resistors in parallel, the expression for the equivalent resistance takes on a particularly simple form, i.e.,

















Answered by  | 7th Jul, 2011, 11:14: AM

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