Electronic – Different voltage sources in parallel


I realize connecting two different voltage sources in parallel is a contradiction (in an ideal circuit). But if I were to connect this in practice and measure the voltage across points A and B, what value of voltage would it show?
And how much current would be sunk by the 5V battery? (Non ideal conditions)
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Best Answer

That totaly depends on the internal resistors of the voltage sources.


simulate this circuit – Schematic created using CircuitLab

Then you can use the superposition principle and calculate the voltage level on the top of the circuit.

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So, if both internal resistors have the same value the voltage V_out would be 7.5V. With other resistor values the voltage can vary between 5V and 10V.