Kirchoff's Current Law (conservation at nodes)

         

The above figure shows part of a circuit. When the currents coming through R1=6Ω R_1 = 6 \Omega and R2=4Ω R_2 = 4 \Omega are I1=8 A I_1 = 8 \text{ A} and I2=2 A, I_2 = 2 \text{ A}, respectively, what is I3? I_3?

In the above circuit, the resistance R1 R_1 is 8Ω 8 \Omega and the other resistances R2,R3, R_2, R_3, and R4 R_4 are 4Ω 4 \Omega each. If I1=21 A, I_1 = 21 \text{ A}, what is the current I2? I_2?

In the above circuit, the current source flow is I=21 A. I = 21 \text{ A}. When the resistances are given by R=3Ω, R = 3 \Omega, find the current Ix. I_x.

In the above circuit, let the resistances Ra=7Ω R_a = 7 \Omega and the resistances R=2Ω. R = 2 \Omega. The voltage of battery is unknown but the current is I=18 A. I = 18 \text{ A}. Find the current Ix I_x in the above circuit.

In the above circuit, I1=4 A, I_1 = 4 \text{ A}, I2=8 A, I_2 = 8 \text{ A}, I3=3 A I_3 = 3 \text{ A} and I4=3 A. I_4 = 3 \text{ A}. What is Ix? I_x?

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