1.

10 kg of water gets frozen at 0^(@)C in a refrigerator kept in a room at 20^@C . The time taken for this is 30 minutes . Considering it to be a cannot refrigerator

Answer»

Heat extracted from ICE is 800 k cal
Power required is 136W
coefficient of performance is 13.65
Work DONE will be `58.6` k cal .

Answer :A::B::C::D


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