9780199339136, Chapter 1, Problem 15P

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Chapter 1, Problem 15P Step-by-step solution Step of 8 Refer to Figure P1 15 in the textbook Calculate the Thevenin's resistance at node 2. (20k)(20k) = 20 = Calculate the Thevenin's voltage at node 2 ( =(10) Step of 8 Draw the Thevenin's equivalent circuit up to node 2 10 kΩ 2 20 kΩ 20 kΩ 3 4 20 kΩ 20 kΩ Figure 1 Step of 8 Calculate the Thevenin's resistance at node Calculate the Thevenin voltage at node 3 20 =(5) 50 = = Step of 8 Draw the Thevenin's equivalent circuit up to node 3 12 kΩ 3 20 kΩ 4 20 kΩ Figure 2 Step of 8 Calculate the Thevenin's resistance at node Calculate the Thevenin's voltage at node 4 20 =(2) 52 =0.769 V Step of 8 Draw the Thevenin's equivalent 12.3 kΩ 4 0.769 V Figure 3 load resistance of 1.5 kΩ is connected between node and ground Comments (1) Anonymous load resistance of 3 Kohm is connected between node and ground Step Draw the modified circuit with load resistor 12.3 kΩ 4 0.769 V 3 kΩ Figure 4 Step of 8 Calculate the load current 0.769 12.3k+3k 0.769 15.3k =0.05 mA Therefore, the current that flows through the load resistance is 0.05 mA