Sir, why do we short circuit the external source to find the output impedance??? And Why don't we short or open circuit anything while finding input impedance? Sir please can you give satisfactory reason for this.....
@R_K_Classes2 жыл бұрын
Dear Student, Please watch thevenin theorem in NAS lecture series. Input impedance means complete circuit can be presented so we will not remove or short load resistance. Thank you 😊
@navaneethdesai2 жыл бұрын
Then why do we short circuit the "external voltage source (Vs)" sir?
@R_K_Classes2 жыл бұрын
All external sources are simply replaced by their internal resistance. Voltage source has zero resistance and current sources has infinite value. That's why we make short circuit Beta.