| Sumit was worried that he would be late for school as his mom woke up late in the morning after attending marriage ceremony of her relative. But she told Sumit not to get worried and cooked lunch for Sumit within fifteen minutes with the help of microwave and Sumit could take the lunch. |
| Read the above passage and answer the following questions: |
| (i) Microwave ovens are used now a days to cook food quickly how? Give reason. |
| (ii) What value is reflected by Sumit's mother? |
Answer:
(i) In microwave oven, the frequency of the microwaves is selected to match the resonant frequency of water molecules, so that energy from the waves get transmitted to kinetic energy of molecules. This kinetic energy raises the temperature of any food containing water. (ii) Presence of mind and knowledge of technology.
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