Question

     The Refrigerator works on which of the following principles? 

    A Centrifugation Correct Answer Incorrect Answer
    B Osmosis Correct Answer Incorrect Answer
    C Dispersion Correct Answer Incorrect Answer
    D Evaporation Correct Answer Incorrect Answer

    Solution

    The basic principle is that whenever a liquid coolant is passed through things at a higher temperature, it absorbs the heat; gets evaporated and the cooling effect is produced. The Refrigerator works on the principle of evaporation. 

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