For the resistance network shown in the figure, choose the correct options (s)

Options

A. the current through `PQ` is zero
B. `I_(1)=3A`
C. The potential at `S` is less than that at `Q`
D. `I_(2)=2A`

Answer

a,b,c,d

Explanation

By intput output symmetry, the current in each of the `2 Omega` resistance is the same. Similarly, the current in each of the `4 Omega` resistance is the same, so the current in each of the `1 Omega` resistance is zero.
So, `I_(2)=12/6=2 A`