Three batteries E1 = 2 Volts, E2 = 4 Volts, and E3 = 3 Volts which each have obstacles in r1 = r2 = r3 = 1 ohm connected with five resistors with resistance R = 2 ohms as Picture. Calculate: a. The size and direction of the electric current passing through the battery E1, E2 and E3 b. Potential difference between point a and b

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