For the circuit shown, with R 1 = 1.0 Ω , R 2 = 2.0 Ω , E 1 = 2 V and E 2 = E 3 = 4 V , the potential difference between the points ‘ a ’ and ‘ b ’ is approximately ( i n V ):

Step-by-step solution

If the electric potential at point a is V a and the electric potential at point b is V b then V b - V a = 2 2 + 4 2 + 4 2 1 2 + 1 2 + 1 2 V b - V a = 1 + 2 + 2 3 2 = 10 3 ∴ V b - V a = 3 . 3   V