Skip to main content

Thevenin's & Norton's Theorem

Thevenin’s Theorem states that any linear electrical network all the voltage sources and resistances  can be replaced by an equivalent voltage source Vth in series connection with an equivalent resistance Rth.

     Example:

thevenian 1

thevenian 2.jpg

If you apply source transformation technique to Thevenin's equivalent circuit then you will obtain Norton's equivalent circuit.

theve north

Comments

  1. […] that the maximum amount of power will be dissipated by a load resistance if it is equal to the Thevenin or Norton resistance of the network supplying power. The Maximum Power Transfer Theorem does not satisfy the […]

    ReplyDelete

Post a Comment

Popular posts from this blog

Tellegens Theorem

Tellegen theorem states that  the summation of instantaneous powers for the n number of branches in an electrical network is zero. Suppose n number of branches in an electrical network have i 1 , i 2 , i 3 , .............i n respective instantaneous currents through them. These currents satisfy Kirchhoff's Current Law . Again, suppose these branches have instantaneous voltages across them are v 1 , v 2 , v 3 , ........... v n respectively. If these voltages across these elements satisfy Kirchhoff Voltage Law then,

relay

A relay is an electrically operated switch. These are remote control electrical switches that are controlled by another switch. A relay is used to isolate one electrical circuit from another. It allows a low current control circuit to make or break an electrically isolated high current circuit path. The basic relay consists of a coil and a set of contacts. The most common relay coil is a length of magnet wire wrapped around a metal core. When voltage is applied to the coil, current passes through the wire and creates a magnetic field. This magnetic field pulls the contacts together and holds them there until the current flow in the coil has stopped. The diagram below shows the parts of a simple relay. Operation: When a current flows through the coil, the resulting magnetic field attracts an armature that is mechanically linked to a moving contact. The movement either makes or breaks a connection with a fixed contact. When the current is switched off, the armature is usually returned by

Fundamentals of Electromagnetism

Electrostatics Columb’s law  Electric Flux density & Electric field intensity Magnetic Flux density &Magnetic field intensity Gauss law Energy density Continuity equation Magneto statics Biot- savart law Amperes circuit law Magnetic momentum & magnetic flux Boundary conditions Applications (Hall effect) Lorentz force equation conduction, polarization & magnetization Maxwell equations Faraday law, ampere law, gauss law of electric and magnetic fields Law of conservation of charge & boundary conditions Hertzian dipole