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DFCCIL Executive Electrical 2016 Official Paper

Option 1 : ∑ power delivered = ∑ power absorbed

ST 1: DC Circuits

2774

20 Questions
20 Marks
25 Mins

__Tellegen’s theorem:__

- According to Tellegen’s theorem, the summation of instantaneous powers for the n number of branches in an electrical network is zero.
- Let n number of branches in an electrical network have I1, I2, I3, ….. In respective instantaneous currents through them.
- These branches have instantaneous voltages across them are V1, V2, V3, ….. Vn respectively.
- According to Tellegen’s theorem, \(\mathop \sum \limits_{k = 1}^n {V_k}.{I_k} = 0\)
- ∑ power delivered = ∑ power absorbed
- It is based on the conservation of energy.
- It is applicable to both linear and non-linear circuits.