Thursday, 21 June 2018

Ohm's law of a circuit which has both a voltage source and current source


The voltage source has a specific voltage through it regardless of the circuit's current and its resistance while the current source has a specific current through it regardless of the voltage through it and its resistance.


My question is:



When there's a circuit which has both a voltage source and a current source with a load, a resistor R for example. How can people apply Ohm's law on it. The sum of both voltage and current must be reserved.


For example, the circuit has a current source and a voltage source connected in a series with a single resistor which



  • The voltage source supply 10V

  • The current source supply 3A

  • The resistance of the resistor is 4 ohm. enter image description here


How can Ohm's law be applied in this case.


If we take 10V then the current will be 2.5A which is lack of 0.5 A to make the sum of current equal 3 as the current source supply while if we take the current through it is 3 A then the voltage through it wil be 12 V that over the one which voltage source can supply. I have seen many circuit which have both of these source without knowing how to apply Ohm's law on it.




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