Ohms Law:
The ratio of potential difference between any two points of a conductor to the current flowing between them is constant, provided the physical condition (temperature) do not change.
V=IR
Discovered by :George Simon Ohm.
Kirchhoff’s Law:
Current law:
The sum of the current flowing towards the junction is equal to the sum of the currents flowing away from it.
Voltage Law:
In closed circuit, the sum of the potential drops is equal to the sum of the potential rises.
The venin’s Theorem
“Any linear active network with output terminals A and B can be replaced by a single voltage source (VTH =VOC) in series with a single impedance (or) (Zth or Rth) resistance.”
Norton’s Theorem
“Any linear active network with output terminals A,B can be replaced by a single current source Isc in parallel with a single impedance (or) resistance Zth=Rth”
Maximum power transfer Theorem
“Maximum power will be delivered from a voltage source to a load, when the load resistance is equal to the internal resistance of the source.”
Reciprocity Theorem
In a linear, bilateral network a voltage source V volts in branch gives rise to a current I, in another branch. If V is applied in the second branch , the current in the first branch will be I. this V/I is called transfer impedance or resistance.
