Question

1/R=1/R¹+1/R²+1/R³. Derive this formula.​

Answer 1

Explanation:

I=I1+I2+I3

LET I1=V/R1

(V IS SAME SINCE THE CIRCUIT IS PARALLEL)

LET I2=V/R2

LET I3=V/R3

V/R=V/R1+V/R2+V/R3

V(1/R)=V(1/R1+1/R2+1/R3) V GET CANCELLED

1/R=1/R1+1/R2+1/R3