Question

Find the effective resistance between a and b. Please show steps.

Answer 1

Here ,The given circuit forms balanced wheatstone bridge .

By which , DC will remove from the circuit

Then , 3ohm and 6ohm are in series

=9 ohm

Also, 2ohm and 4 ohm are in series

=6ohm

now , both becomes in parallel combination .

so , 1/R= 1/9+1/6

=5/18

R(AB) = 18/5 ohm .

soln refers to the attachment

Answer 2

5ohm resistance is removed from the circuit

because it's a wheatstone bridge

then 6 ohm and 3 ohm are in series

r =9ohm

and 2 and 4 ohm are in series

r=6ohm

both are in parallel combination

1/R= 1/9+1/6

=2+3/18

=5/18

R=18/5 ohm