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Current through resistor

Assuming each battery has internal resistance r = 1.0 O, determine the magnitudes and directions of the currents through each resistor shown in the following figure.The batteries have emfs of 1 = 9.0 V and 2 = 12.0 V and the resistors have values of R1 = 15 O, R2 = 20 O, and R3 = 30 O.

What are the currents through R1, R2 and R3?
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Answer #1

figure ?

answered by: alessandria
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Answer #2

let from left to right to downward be positive direction.
I1R1-I2R2-E1=0.
I2R2+I3R3+E2=0.
I1+I2=I3.
plug R1=15 R=20 R3=30 E1=9 and E2=12 in .
we have I1 = 0.156
I2=-0.33
I3=-0.178

answered by: suri
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