What have you tried? What's the usual procedure?Ash_M said:
Hint: Maximum power transfer theorem.
gneill said:
You can always do a "KVL walk" from A to B and sum up the potential changes along the way.Ash_M said:
Yes.
gneill said:
Ash_M said:
You did well, and a "KVL walk" is just what you did. Haha thanks so much!gneill said:
0 V is a perfectly valid result.
gneill said:
0 V is a perfectly valid result.
You've used A as the reference node for your first equation, so it's potential is defined to be zero. That is, Va = 0 is the node equation for AConor_B said:
gneill said:You've used A as the reference node for your first equation, so it's potential is defined to be zero. That is, Va = 0 is the node equation for A
A node whose potential is taken as 0V for reference. All the voltages in the circuit are measured with respect to the reference node. It is also called as the "circuit ground".Conor_B said:
When you do nodal analysis you are determining the potentials of various nodes of the circuit with respect to some reference node. The first step is always to choose the node that will be the reference node for all the potentials.Conor_B said:
cnh1995 said:
gneill said:
A Thevenin Equivalent Circuit is a simplified representation of a complex electrical circuit that can accurately predict the behavior of the original circuit. It consists of a single voltage source and a single resistor that are equivalent to the original circuit, when viewed from a specific set of terminals.
To calculate the Thevenin Equivalent Circuit, the circuit is first simplified by removing all loads and shorting all voltage sources. Then, the equivalent resistance is calculated by finding the total resistance between the terminals. The equivalent voltage is calculated by measuring the voltage across the open terminals. The voltage source is then placed in series with the equivalent resistance to create the Thevenin Equivalent Circuit.
A Thevenin Equivalent Circuit is only accurate for linear circuits, meaning that the components must follow Ohm's Law. It also assumes that the circuit is in a steady-state condition and that the components are not temperature dependent. Additionally, it does not take into account the effects of inductance or capacitance.
A Thevenin Equivalent Circuit is useful because it simplifies complex circuits, making them easier to analyze and understand. It also allows for quick and accurate calculations of voltage and current at different points in the circuit. It is also helpful for troubleshooting and designing new circuits.
Thevenin Equivalent Circuits are commonly used in electronic systems such as power supplies, amplifiers, and filters. They are also used in telecommunications, where it is necessary to analyze the behavior of a circuit with varying loads. Thevenin Equivalent Circuits are also used in circuit simulation software to model and predict the behavior of circuits before they are built.