Find the current in the 4.00 ohm resistor in the drawing?

NetherCraft 0


I am having such a hard time starting this. I know we use kirchoff’s law but I just keep second guessing if I am setting up the problem right!

Can anyone at least help me start? I’m not really looking to find a final answer(would be nice but i can live without it), but I am most looking to understand how to do it (cause I expect this sort of stuff on my exam coming up)!

Also Check This  What is capable of performing several tasks and allows the user to select the task?

Thanks for any help guys!

1 Answer

  • “a ‘ be the current through 2 Ω from left to right an b be the current through 8 Ω so that the current through 4 Ω is ( a +b)

    Considering the potential equations

    in the left loop

    6a +4 b = 9

    In the left loop

    12b + 4a = 15

    a = 0.86 A and b = 0.96 A and a + b = 1.82 A



    The assumed current a passes through both 2 Ω and 4 Ω, the sum of the potentials

    = 6 a .

    The assumed current meets the negative of the 6 V and 3V battery hence the potential is – 6V – 3V = – 9V

    The sum must be zero

    6a +4 b -9 = 0

    Similar explanation is for the other loop.


Leave a Reply

Your email address will not be published. Required fields are marked *