In the circuit shown, the current through the `4 Omega` resistors is `1 amp` when the points `P` and `M` are connected to a `dc` voltage source. The potential difference between the points `M` and `N` is.
.

Options

A. 0.5 V
B. 3.2 V
C. 1.5 V
D. 1.0 V

Answer

B

Explanation

`V_1 = ((1)/(1 + 0.25)) xx 4 = (4)/(5) xx 4 = 3.2 V`.