Question

Determination of the equivalent resistance of two resistor when connected in series and parallel

Answer 1

in series Req = R1 +R2 +R3.....Rn

in parallel Req= 1/R +1/R2 ...... 1/Rn

Answer 2

R(series) = R1 + R2

$r(parallel) = \frac{r1 \times r2}{r1 + r2}$