Determine the currents I1, I2, and I3 in Fig. 19-40. (R5 =?

Determine the currents I1, I2, and I3 in Fig. 19-40. (R5 = 17 ) Assume the internal resistance of each battery is r = 1.0 .


I1 = A


I2 = A


I3 = A














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is the link to the question. But my R5 is 17 Ohms, not 15

Determine the currents I1, I2, and I3 in Fig. 19-40. (R5 =?
Remember Ohm's Law is V=IR, and that the sum of voltages around a closed loop is 0.





sum the voltages around a loop, for example, the top one:





12 - 1*I1 - 8*I1 + 12 - 1*I2 - 10*I2 - 12*I1 = 0





Once you have two equations like this, remeber Kirchoff's Node Law: Current into a node = current out of a node.





Therefore, using the node on the right: I2 + I3 = I1





You can then solve for each current in terms of another, plug in these values and solve for the other current.