Door of a refrigerator has a weak magnetic strip all around it. Why?

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Solution

The door of a refrigerator is fitted with a magnetic strip to keep its door closed. This strip ensures the refrigerator to remain airtight. A special, flexible strip containing magnetic particles is lined at the inner border of the refrigerator door. When the door is closed, the magnetic strip gets attracted to the metal body of the refrigerator, and the moulded rubber pad attached to the surface of the door touches the refrigerator body, creating an airtight lock.

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