To a current source with an EMF equal to 400 mV and an internal resistance of 1 Ohm, two resistors

To a current source with an EMF equal to 400 mV and an internal resistance of 1 Ohm, two resistors of 2 Ohm each are connected. Determine the potential difference across the terminals of the current source if the resistors are connected in parallel.

Determine the total resistance of the two resistors:
1 / R = 1 / r + 1 / r = 2 / r = 2/2 Ohm = 1/1 Ohm.
R 1 Ohm.
We find the current in the circuit according to Ohm’s law for a complete circuit: I = E / (R + Rin) = 0.4 V / (1 Ohm +1 Ohm) = 0.2 A.
Source terminal voltages: U = IR = 0.2 A * 1 Ohm = 0.2 V.
Answer: 0.2 V.