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प्रश्न
A device in which the loss of heat due to conduction, convection and radiation is minimized is ______.
विकल्प
solar cell
solar cooker
thermometer
thermos flask
MCQ
रिक्त स्थान भरें
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उत्तर
A device in which the loss of heat due to conduction, convection and radiation is minimized is thermos flask.
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