In the figure, R1 = 99 . R2 = R3 = 49.5 . R4 = 75.0 , and the ideal battery has emf script e = 6.00 V.
What is i in R1?
i = E / (R+r)
The Attempt at a Solution
The Loop Rule states that for any loop in a circuit, the sum of the voltages across the things in it will be zero. So by combining R2 R3 R4 into Req of resistance 18.609 ohms, I have a loop, so I add the voltages:
E - iR1 - iReq = 0
E = 6 as given in the problem. (Right? Maybe I'm wrong here.)
By the Junction Rule, the current i at R1 and Req would be the same.
6 - i(R1 + Req) = 0
But this just gives me the equivilant resistance for all the resistors, and let's call that plain R.
So I have i = E/R, which is an equation I already had, so I felt good about coming across it via application of the two rules, but when I use this to find the current I don't get the right answer. My numerical answer to the question is 0.51016494 A.
I don't exactly know where I'm going wrong here...
Thank you for looking at this.