IMPEDANCE

An AC putting a voltage v on load z and running current I

Electrical impedance means how much the circuit impedes the flow of electric current. It is the computation of opposition to a Alternating Current. Electrical impedance is the similar to electrical resistance; the SI unit is the ohm. The term impedance was coined by Oliver Heaviside in July 1886.The inverse of Electrical Impedance is Admittance. We Know that V=IR. On substituting R with Z we get

V'=I'Z'=I'Z*e^jθ

Magnitude of the impedance-Z-It works like a resistance , Impedance-Z',Current- I'