The overall resistance L that describes the composite material shown in the diagram to the side is given T1 ki R, T2 k3 R3 by R,R2+R1 R3 A) R1+R2+R3 R,R2+R2R3 B) R1+R2+R3 Why? k, R, L2 L3 R1+Rz+R3 R1R2+R1R3

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