In order to make an efficient solar cooker, the cover of cooker box should be made of :
(a) transparent plastic sheet (b) shining aluminium sheet
(c) butter paper sheet (d) transparent glass sheet

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Solution

Ans (d) Transparent Glass sheet

Solar cookers are covered with a glass plates in order to capture heat. More and more heat is captured. Just like the green house effect, the glass plate does not allow the heat to escape. Thus cooking of food is done efficiently.

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Q. Two students made box-type solar cookers separately. They both painted the insulated box with black colour from inside, the cooking pots were painted black from outside, and a plane mirror reflector was also attached. One of the students covered the solar cooker box with a transparent glass sheet but the other student covered the solar cooker box with a transparent plastic sheet. Which of the two solar cookers will be more efficient and why?

Q. Question 9
Which part of the solar cooker is responsible for greenhouse effect?

(a) Coating with black colour inside the box
(b) Mirror
(c) Glass sheet
(d) Outer cover of the solar cooker

(a) With the help of a labelled diagram, explain the construction and working of a solar cooker.
(b) Why is the solar cooker box painted black from inside ?
(c) Why is the solar cooker box covered with a glass sheet ?

Q. The part of box-type solar cooker which is responsible for producing greenhouse effect is :
(a) plane mirror reflector (b) black coating inside the box
(c) glass sheet cover (d) utensils placed in the cooker box

Q. While making a kaleidoscope, a transparent plastic sheet is pasted under the cardboard disc in order to:

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In order to make an efficient solar cooker, the cover of cooker box should be made of : (a) transparent plastic sheet (b) shining aluminium sheet (c) butter paper sheet (d) transparent glass sheet

Ans (d) Transparent Glass sheet Solar cookers are covered with a glass plates in order to capture heat. More and more heat is captured. Just like the green house effect, the glass plate does not allow the heat to escape. Thus cooking of food is done efficiently.

In order to make an efficient solar cooker, the cover of cooker box should be made of :
(a) transparent plastic sheet (b) shining aluminium sheet
(c) butter paper sheet (d) transparent glass sheet

Ans (d) Transparent Glass sheet

Solar cookers are covered with a glass plates in order to capture heat. More and more heat is captured. Just like the green house effect, the glass plate does not allow the heat to escape. Thus cooking of food is done efficiently.