The door of a working refrigerator is left open in a well insulated room. The temperature of air in the room…

The door of a working refrigerator is left open in a well insulated room. The temperature of air in the room will
  1. decrease
  2. increase in winters and decrease in summers
  3. remain the same
  4. increase

Solution

In a refrigerator, the heat dissipated in the atmosphere is more than that taken from the cooling chamber, therefore the room is heated. If the door of a refrigerator is kept open.

Asked in: JEE Main 2012 (26 May Online)

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