1.

Working of an Ac motor (not generator){Only for genius}​

Answer»

An AC or a refrigerator does some work to move heat from the cold reservoir/sink to the HOT reservoir or source . So if you want to COOL a ROOM by opening a refrigerator then the room cannot be cooled because the cold reservoir is the refrigerator and the hot reservoir is the room , then the heat from the refrigerator is expelled back to the room but you can cool a room with an AC as the sink here is the room and the source is the outside environment .
Efficiency is DENOTED by β
β = heat expelled / amount of work done
= Q₂/What is
= Q₂/Q₁ - Q₂
= T₂/T₁ - T₂



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