18. DC CIRCUIT: THEVENIN EQUIVALENT WITH DEPENDENT-SOURCE: DUMMY SOURCE METHOD

THEVENIN EQUIVALENT WITH DEPENDENT-SOURCE: DUMMY SOURCE METHOD Practice Problem 4.9 Find the Thevenin equivalent circuit of the circuit in Fig. 4.34 to the left of the terminals. Answer: VTh 5.333 V, RTh 444.4 Practice Problem 4.9 Find the Thevenin equivalent circuit of the circuit in Fig. 4.34 to the left of the terminals. Answer: VTh 5.333 V, RTh 444.4 Practice Problem 4.9 Find the Thevenin equivalent circuit of the circuit in Fig. 4.34 to the left of the terminals. Answer: VTh 5.333 V, RTh 444.4 We walk you through a step-by-step solution to find the Thevenin equivalent of a DC circuit that includes a dependent source. Unlike standard methods, this tutorial focuses on using the dummy source method — a useful approach when you cannot turn off all sources due to the presence of dependent elements. We’ll cover: How to identify when the dummy source method is needed How to insert a test source (voltage or current) across the open terminals How to calculate the resulting response (current or voltage) How to find Thevenin resistance using the ratio of voltage to current How to determine Thevenin voltage using open-circuit analysis This tutorial is perfect for students studying electrical engineering, especially those using popular textbooks like Sadiku, Hayt, or Nilsson. The explanation is beginner-friendly, yet precise enough to help you gain a strong conceptual understanding of dependent-source handling in Thevenin analysis.