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Four resistors R1=R2 =1Kohm, R3=R4=2Kohm, are connected in series, and their combination is connected in parallel...

Four resistors R1=R2 =1Kohm, R3=R4=2Kohm, are connected in series, and their combination is connected in parallel with R5=2Kohm and R6=3Kohm. An ammeter measures an electric current of 3mA flowing through the resistor R5. What is the voltage applied to the circuit

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