Procedure

Circuit Diagram:

[Fig 1: Circuit diagram of experimental set-up for verification of Tellegen's theorem]

1. Connect the circuit as shown in the circuit diagram above, keeping the switches open and resistance at their maximum positions.


2. Case 1: In presence of both the sources
   Select switch of S₁ to Power and S₂ to Power and switch on the supply to get the ammeter readings. Observe the power supplied in +ve and power dissipated in -ve by the elements and voltage source for this condition.
   


3. Case-2: In presence of V₁ only
   Select switch of S₁ to Power and S₂ to short and switch on the supply. Read the corresponding power values as done in the above case.
   
   
4. Case-3: In presence of V₂ only
   Select switch of S₁ to Short and S₂ to switch on the supply. Read the corresponding power values.
   
   Calculate the power consumed or delivered by each element for each case and check if power absorbed = power delivered. This proves the Tellegen's theorem.