Question

Three resistors each of 9Ω to be connected in which way to get a resultant resistance of 6.25Ω.

Answer 1

Explanation:

U can't get 6.25 but can get 6 ohms.

First, connect 2 resistors in series, so R=9+9=18ohms.

Now, connect this R to other 9 ohm in Parallel.

So, 1/(R(net))=(1/9)+(1/18)

R(net)=18x9/(18+9)=18x9/27=6 ohms

So, net resistance is 6 ohms.

Thank you