Question

please help me to solve this question​

Answer 1

Answer:

Resistance of each resistor R=9Ω

Two resistor connected across A and B are connected in parallel.

Equivalent resistance across A and B

Rab= R×R/R+R= R/2 = 9/2 =4.5 ohm

This equivalent resistance is connected in series to another resistor R.

So equivalent resistance across A and C

Rac=Rab+R=4.5+9=13.5Ω

(ii) Two resistors in series and one in Parallel R=R1+R2=9+9=18Ω

1/R'=1/R+1/R0=1/18+1/9=1+2/18=3/18

R'=18/3=6Ω