A solar cooker may not cook food if

(a) the solar cooker is not placed in the shade
(b) the glass sheet cover of solar cooker is not closed
(c) a convex mirror reflector is not used
(d) the food containers of insulting material are not used

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Solution

(b) the glass-sheet cover of the solar cooker is not closed

The glass sheet prevents the sunlight incident on it from being reflected back.

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Prateek's mother decided to cook food in a solar cooker but she found that food cannot be cooked in that solar cooker. What might be the reason for the same?

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A solar cooker may not cook food if (a) the solar cooker is not placed in the shade (b) the glass sheet cover of solar cooker is not closed (c) a convex mirror reflector is not used (d) the food containers of insulting material are not used

(b) the glass-sheet cover of the solar cooker is not closed The glass sheet prevents the sunlight incident on it from being reflected back.

A solar cooker may not cook food if

(a) the solar cooker is not placed in the shade
(b) the glass sheet cover of solar cooker is not closed
(c) a convex mirror reflector is not used
(d) the food containers of insulting material are not used

(b) the glass-sheet cover of the solar cooker is not closed

The glass sheet prevents the sunlight incident on it from being reflected back.