Question

we have 3 resistor containing 3ohms each.To get a resistance of 2ohms ,we should connect them​

Answer 1

Answer:

Three resistors of 3 ohms resistance. We have to connect all these resistor such that their equivalent will be 2 ohms. At first, we will connect two 3 ohms resistors in series . Then , their equivalent resistance is , 3 + 3 = 6 ohms.

Answer 2

Answer:

2 resistors in series and 1 resistor in parallel to the two. (refer pic)

proof:

The two resistors connected in series will ne equivalent to 6 ohms.

So, one 6 ohm and one 3 ohm would be connected in parallel.

$\frac{1}{6} + \frac{1}{3} = \frac{1}{required \: resistance}$

$\frac{3}{6} = \: \frac{1}{required \: resistance}$

required resistance = 2 ohms