Question

the total resistance between point a and b is​

Answer 1

Explanation:

in series total resistance =10+10+10+20+20+20 ohm

90ohm

in parallel it is reciprocal

Answer 2

Answer:

12/ 13 Ω

Explanation:

Series combination:

10+10+10= 30

20

20+20= 40

parallel combination:

1/R= 1/30+ 1/20+ 1/40

=  $\frac{40+60+30}{120}$

= 130/120

1/R = 13/12

R= 12/13 Ω