Question

Show how would you join three resistors each of resistance 9 ohm so that the equivalent resistance of the comdination is I) 13.5ohm ii)6ohm

Answer 1

1). Let us take two resistors in parallel while other in series along them
Therefore
1/ Rp = 1/ 9 + 1/9
= 2/9
Rp = 9/2 = 4.5 ohm
Now,
Rt = Rs + Rp
= 9 + 4.5
= 13.5 ohm
2). Let us take two resistors in series and one in parallel along them
Therefore
Rs = 9+9
= 18 ohm
1/Rt = 1/ Rs + 1/ Rp
= 1/ 18 + 1/ 9
= 1 + 2 / 18
= 3/18
Rt = 18/ 3
= 6 ohm
Hope this helps you dear

Answer 2

Hey hope given attachment helps you
If any problem inbox me

@Rohit