Table of Contents
What is Thevenin’s Theorem formula?
Any combination of batteries and resistances with two terminals can be replaced by a single voltage source e and a single series resistor r. The value of e is the open circuit voltage at the terminals, and the value of r is e divided by the current with the terminals short circuited.
What is the main idea of a Thevenin equivalent circuit?
Thevenin’s Theorem states that Any linear circuit containing several voltages and resistances can be replaced by just one single voltage in series with a single resistance connected across the load.
How do you find Thevenin equivalent circuit?
The process for analyzing a DC circuit using Thevenin’s Theorem requires the following steps:
- Find the Thevenin Resistance by removing all voltage sources and load resistor.
- Find the Thevenin Voltage by plugging in the voltages.
- Use the Thevenin Resistance and Voltage to find the current flowing through the load.
What is meant by the word equivalent in Thevenin’s equivalent circuits?
In electrical engineering and science, an equivalent circuit refers to a theoretical circuit that retains all of the electrical characteristics of a given circuit. … However, more complex equivalent circuits are used that approximate the nonlinear behavior of the original circuit as well.
How do you calculate RTh in a circuit?
3. Calculate RTh = VTh / IN. Alternate method (for circuits that consist only of independent sources and resistors).
What do you mean by equivalent circuit?
: an electric circuit made up of the basic elements resistance, inductance, and capacitance in a simple arrangement such that its performance would duplicate that of a more complicated circuit or network.
What are the two components of a Thevenin equivalent circuit?
Question: The two basic components of a Thevenin equivalent ac circuit are The equivalent voltage source and the equivalent parallel impedance.
What is the basis of nodal analysis?
Nodal Analysis is based on the application of the Kirchhoff’s Current Law (KCL). Having ‘n’ nodes there will be ‘n-1’ simultaneous equations to solve. Solving ‘n-1’ equations all the nodes voltages can be obtained. The number of non reference nodes is equal to the number of Nodal equations that can be obtained.
Can we use Thevenins theorem on a circuit containing a BJT?
Can we use Thevenin’s theorem on a circuit containing a BJT? Explanation: We can use Thevenin’s theorem only for linear networks. BJT is a non-linear network hence we cannot apply Thevenin’s theorem for it.
How do you solve the Thevenin equivalent circuits with dependent sources?
How do I convert Thevenin to Norton?
Thevenin voltage is equal to Norton’s current times Norton resistance. Norton current is equal to Thevenin voltage divided by Thevenin resistance.
What is difference between Thevenin and Norton Theorem?
Norton’s theorem uses a current source, whereas Thevenin’s theorem uses a voltage source. Thevenin’s theorem uses a resistor in series, while Norton’s theorem uses a resister set in parallel with the source. Norton’s theorem is actually a derivation of the Thevenin’s theorem.
What is an example of equivalent?
The definition of equivalent is something that is essentially the same or equal to something else. An example of equivalent is (2+2) and the number 4. Since 2+2= 4, these two things are equivalent. … Equal, as in value, meaning, or force.
How do you know if a circuit is equivalent?
For a parallel circuit with three resistors, the voltage drop across each resistor equals the supply voltage. In other words, for a parallel circuit, the equivalent resistance is found by adding the reciprocals of the individual resistance values, and then taking the reciprocal of the total.
Why do we use equivalent circuits?
Equivalent Circuit. Equivalent circuits are used in order to approximate the experimental impedance data with the above-mentioned ideal or distributed impedance elements, both arranged in series and/or in parallel. Many electrochemical systems have been analyzed according to this procedure.
How do you calculate RL in a circuit?
Series RL Circuit Analysis
- Since the value of frequency and inductor are known, so firstly calculate the value of inductive reactance XL: XL = 2fL ohms.
- From the value of XL and R, calculate the total impedance of the circuit which is given by.
- Calculate the total phase angle for the circuit = tan 1(XL/ R).
What is VTH and RTH?
The Thevenin voltage VTH is defined as the open-circuit voltage between nodes a and b. RTH is the total resistance appearing between a and b when all sources are deactivated.
How do you make equivalent circuits?
What is the Thevenin equivalent resistance?
The Thevenin Equivalent Circuit is the electrical equivalent of B1, R1, R3, and B2 as seen from the two points where our load resistor (R2) connects. … In other words, the load resistor (R2) voltage and current should be exactly the same for the same value of load resistance in the two circuits.
How do you calculate equivalent current?
The sum of the current in each individual branch is equal to the current outside the branches. The equivalent or overall resistance of the collection of resistors is given by the equation 1/Req = 1/R1 + 1/R2 + 1/R3 …
Which theorem is current form of an equivalent circuit?
Thevenin’s theorem Norton’s Theorem:Any two terminal bilateral linear DC circuits can be replaced by an equivalent circuit consisting of a current source and a parallel resistor. Norton’s theorem is the converse of Thevenin’s theorem.
How is Norton equivalent calculated?
What is the Norton equivalent current?
Norton’s equivalent circuit resembles a practical current source. Hence, it is having a current source in parallel with a resistor. The current source present in the Norton’s equivalent circuit is called as Norton’s equivalent current or simply Norton’s current IN.
What is G in nodal analysis?
The A matrix is (m+n)x(m+n) (n is the number of nodes, and m is the number of independent voltage sources) and: the G matrix is nxn and is determined by the interconnections between the passive circuit elements (resistors) the B matrix is nxm and is determined by the connection of the voltage sources.
Is KCL nodal analysis?
In analyzing a circuit using Kirchhoff’s circuit laws, one can either do nodal analysis using Kirchhoff’s current law (KCL) or mesh analysis using Kirchhoff’s voltage law (KVL). … Nodal analysis is possible when all the circuit elements’ branch constitutive relations have an admittance representation.
How do you calculate nodal?
Procedure of Nodal Analysis
- Step 1 Identify the principal nodes and choose one of them as reference node. …
- Step 2 Label the node voltages with respect to Ground from all the principal nodes except the reference node.
- Step 3 Write nodal equations at all the principal nodes except the reference node.
Can Thevenin theorem be applied to AC circuits?
We can use Thevenin’s Theorem to analyze power systems that varying values of load resistance. In addition, we use the Theorem to analyze single frequency AC circuits that have impedance values rather than resistance values.
Can we verify Thevenin’s theorem both on AC and DC circuits?
Thevenin’s Theorem Statement Similar to the DC circuits, this method can be applied to the AC circuits consisting of linear elements like resistors, inductors, capacitors. Like thevinin’s equivalent resistance, equivalent thevinin’s impedance is obtained by replacing all voltage sources by their internal impedances.
What is equivalent circuit for voltage source?
The equivalent circuit is a voltage source with voltage VTh in series with a resistance RTh. The Thvenin-equivalent voltage VTh is the open-circuit voltage at the output terminals of the original circuit.