Circuit Theory is one of the fundamental principles in electrical engineering, focusing on the study of the relationship between voltage, current, resistance, and other electrical components within a circuit. This theory provides the foundation for understanding how electricity flows and how electronic and electrical devices operate.<br /><br />In the field of forensic science, circuit theory plays a significant role in investigations involving electrical or electronic crimes. For example:<br /><br />In cases of electrical fires, forensic experts analyze electrical circuits to determine whether the fire was caused by a technical fault or intentional sabotage.<br /><br />In electricity theft cases, examining electrical circuits can reveal tampering with meters or unauthorized connections to the grid.<br /><br />In cybercrime investigations, circuit-level analysis of seized devices such as computers and mobile phones can uncover evidence of manipulation or illegal modifications.<br /><br />Thus, the application of circuit theory extends beyond academic and industrial contexts, serving as an effective tool in supporting justice and uncovering the truth through technical evidence.<br /><br />Al-Mustaqbal University – The First University in Iraq