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3. (a) Write Kirchhoff’s rules for the two loops and one junction for circuit shown below. (b) Solve the equations for the current in each branch of the circuit when ε1 = 10V, ε2 = 2V, R1 = 50Ω, R2 = 200Ω, and R3 = 20Ω. (c) Calculate the voltage across resistor R3 from point B to point A.

R1
R2
R3
B
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