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 ?

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 ?

The electromagnetic waves which are used in the working of solar water heaters and cookers are called.........

Steam is present in a pressure cooker at 1.5 atm pressure and 150^(@)C . If the pressure cooker can withstand a maximum of 4 atm pressure and there is no provision of a weight atop the cooker then at what temperature will the cooker explode?

A pressure cooker works on the principle of

Assertion (A): Cooking time in pressure cooker is reduced. Reason (R ): The boiling point inside the pressure cooker is raised.