Question

find the following equivalent resistance in the following circuit r1 20ohm r2 10ohm r3 40ohm ​

Answer 1

Answer:

if the resistors are connected in series then the equivalent resistance will be

R= r1+r2+r3

Re=70 ohm

if the resistors are connected in parallel then equivalent resistance will be

$\frac{1}{re \: } = \frac{1}{r1} + \frac{1}{r2} + \frac{1}{r3}$

1/re =1/20+1/10+1/40

$\frac{1}{re} = 0.175$