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Asked in GUJCET 2020 · Transformers
Idea: Pᵢ is the power drawn by the primary and Pₒ the power delivered by the secondary.
In a real transformer some power is always lost: I²R heating of the windings, eddy currents and hysteresis in the core, and flux leakage.
Pₒ=Pᵢ-Pₗₒₛₛ, so Pᵢ>Pₒ and the efficiency is less than 100%.
So for a real transformer Pᵢ>Pₒ.
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