Question

why is the cooling unit of a refrigerator made at the top?​

Answer 1

Answer:

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This is based on the principle of convection currents. What happens is that due to the cooling, the air becomes denser and moves downward. This creates a partial vacuum above, which is replaced by the warmer air, which also gets cooled by the unit. If it was placed anywhere else, it would be less effective, and the cooling would less well distributed.

Answer 2

Answer:

Hot air rises up whereas cold air rises down.

Therefore the cooling unit of refrigerator made at the top.

Hope it help.