Q2. Figure 2 shows a d.c. circuit with a variable resistor RL. 50 60_ A R Figure 2 (a) By using The venin's Theorem, find the Thevenin voltage ETH and resistance RIH (b) Based on the results in (a), draw the equivalent circuit. (c) Find the value of Ri so that it can be obtained the maximum power. Find the load current I and load voltage Vr. Hence, or otherwise, determine the maximum power of the Total. load RI . 30marks