Question

Match the following:
$\begin{array}{cc}\text{I. Coating solar cooker with black paint}& \text{a. Causes greenhouse effect inside the cooker}\\ \text{II. Concave mirror}& \text{b. Absorbs more heat}\\ \text{III. Glass sheet covering}& \text{c. Converge heat at one point}\end{array}$

• A. I-a, II-b, III-c
• B. I-b, II-c, III-a
• C. I-c, II-b, III-a
• D. I-b, II-a, III-c

Answer 1

The correct option is B I-b, II-c, III-a

Solar cookers use the heat from the sun for cooking food. The functions of different components of the solar cooker are as follows:
1. Glass lid - covers from the top and creates greenhouse effect inside the cooker
2. Black painted surface - the surface of the solar cooker is painted black as black absorbs maximum solar energy. This increases the temperature inside the solar cooker.
3. Plane Mirror - plane mirror as a reflector and reflects more rays inside the cooker.
4. Concave mirror - concave mirrors are provided in the solar cookers for concentrating solar rays at one point. This increase the maximum temperature reached inside the solar cooker.
5. Insulator - an insulator is used to cover the solar cooker from outside so that the heat is not lost out of the cooker.