Thevenin’s Theorem

Thevenin’s Theorem

Theorem:- In a linear lumped bi-lateral network, the current  flowing through any branch or load resistor(R1) can be obtained by reading the circuit into a voltage source(VTM) and a series connected resistor(RTH).
             IL= VTH/RTH+RL
2) The circuit connection are given as shown in the circuit diagram.

3) The Switches circuit  SW1, SW2, and SW3 are closed and the current flowing through load resistor(RL) is noted .

4) The load resistor removed by opening switch SW3. The open circuit  voltage is measured across terminal AB.

5) Short circuit the terminal AB and short circuit current ISC is noted. The value of RTHis given by RTH= VOC/ISC

6) The current flowing through the load resistor RL is calculated by using the thevenin’s formula.
                              IL=VTH/RTH+RL

7) By verifying the value of resistance by R1,R2 and R3 different set of reading  obtained and are tabulated.


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