The Thevenin resistance is calculated by removing all voltage and current sources from the circuit and then finding the equivalent resistance between the two terminals where the load is connected.
Removing the load allows us to find the equivalent resistance of the circuit without being affected by the load. This allows us to accurately determine the Thevenin resistance, which is important in circuit analysis and design.
Removing the load does not affect the voltage at the load terminals. The voltage at the load terminals remains the same as it was before removing the load. However, the voltage may change if the load is reconnected to a different circuit.
No, the Thevenin resistance cannot be negative. Resistance is a physical property of a material or component and cannot have a negative value.
The Thevenin resistance is an important factor in determining the overall performance of a circuit. It affects the current flow, power dissipation, and voltage drop in the circuit. A higher Thevenin resistance can result in a larger voltage drop and lower current flow, while a lower Thevenin resistance can result in a lower voltage drop and higher current flow.