Question

derivation of parallel combination of resistance​

Answer 1

suppose two resistors are joined in parallel combination then

1/R(resultant resistance)=1/R1+1/R2

Then simplify

Answer 2

Let us consider two resistors R1 and R2 connected in parallel and supplied to a potential difference of V volt.

We know that in parallel combination

potential difference remain constant

I = I1 + I2

V/R=V/R1 + V/R2

V/R=V(1/R1 + 1/R2)

1/R=1/R1 + 1/R2

Where R is the equivalent resistance

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