Consider the circuit shown in Figure Q11(a), a battery Vs = 15V with an internal resistance Rs is connected to a load resistance RL. Rs RL Vs Figure Ọ11(a) (a) If a load resistance Ri= 400 22 is connected, VL= 10 V is measured. (i) Find the current Is flowing in the circuit. (ii) Determine the value of the internal resistance Rs: (iii) What is the power dissipated in the load resistor Rz? (b) The load resistance RL is replaced by a network of resistors R1 = 20 22, R2 = 30 22 and R3 = 50 22 shown in the Figure 011(b). (i) Find the equivalent resistance across AB. (ii) Find the voltage VAB across AB. Rs R1 Figure Q11(b) B VAB

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