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A device in which the loss of heat due to conduction, convection and radiation is minimized is (a) Solar cell (b) Solar cooker (c) Thermometer

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A device in which the loss of heat due to conduction, convection and radiation is minimized is 

(a) Solar cell 

(b) Solar cooker 

(c) Thermometer 

(d) Thermos flask

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1 Answer

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1. (a) Heat 

2. (d) kelvin 

3. (c) Rod-1 

4. (b) Conduction 

5. (d) Thermos flask

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