InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
How can mechanical energy be converted in to heat energy ? Explain with an example. |
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Answer» When we mb our palms, the palms warm, because of friction. When we beat a metal strip continuously with a hammer, it becomes hot. Mechanical energy can be converted into heat energy. |
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| 2. |
The energy that we get from the sun is called a. Solar energy b. Muscular energy c. Wind energy d. Water’s stored energy |
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Answer» a. Solar energy |
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| 3. |
Fill in the blanks:1. The ability to do work is ...........2. The energy which is released by burning of fuels is .......... |
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Answer» 1.The ability to do work is energy 2.The energy which is released by burning of fuels is heat energy. |
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| 4. |
How is wind used to Produce Electricity. |
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Answer» Windmills rotate due to the fast movement of wind. Turbines rotating due to this wind energy produces electricity. |
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| 5. |
Fill in the blanks:1. Any object that is moving has .......... energy init.2. The SI unit of energy and work is .......... |
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Answer» 1. Any object that is moving has kinetic energy init. 2. The SI unit of energy and work is Joule |
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| 6. |
The kind of energy produced in gobar gas plant is a. Heat energy b. Chemical energy c. Bioenergy d. Electrical energy |
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Answer» c. Bioenergy |
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| 7. |
Define wind energy. |
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Answer» Any object that is moving has energy in it. Moving air also has energy. It is called wind energy. |
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| 8. |
Use the clues in the bracket and write and write which alternative energy can be saved by following activities given below. [Fuel, chemical, electric, charcoal] |
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| 9. |
How is water used to produce electricity? |
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Answer» Water stored in a dam has potential energy which gets converted into kinetic energy when water passes through the gates of a dam. Stored water flowing through the gates of a dam. |
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| 10. |
Name the forms of energy. |
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Answer» 1. Muscular energy. 2. Mechanical energy. 3. Heat energy. 4. Solar energy. 5. Wind energy. 6. Waters stored energy. 7. Electrical energy. 8. Bioenergy. 9. Chemical energy. |
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| 11. |
Write the uses of bioenergy? |
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Answer» 1. It is used for cooking. 2. The energy available from biogas can be converted into electricity and may used for many works. |
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| 12. |
List the names of dams you know or which you have visited? |
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Answer» 1. Kabini dam 2. Alamatti dam |
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| 13. |
State the law of conservation of energy. |
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Answer» Energy can neither be created, nor be destroyed. It changes from one from to another. The total energy remains constant. This is called law of conservation of energy. |
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| 14. |
Think how energy changes from one form to another form in 1. A solar cooker2. An electric heater. |
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Answer» 1. We get heat and light energy from the sun, From solar energy, we can prepare food using solar cooker. 2. Electrical energy is generated at power stations and supplied to our homes. |
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| 15. |
By using clues in the bracket, write the alternate energy used [solar water heater, goober gas, solar cooker, solar cells]. |
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| 16. |
Write two situations of saving electricity? |
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Answer» 1. Embrace natural light 2. Unplug any appliances that aren’t in use. |
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| 17. |
If you have appliances which make use of fuels at your home, name them? |
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Answer» 1. Cooking purpose 2. Vtchels |
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| 18. |
In the following activities write that the energy changes from which form to what from?Running of petrol carChemical energy (fuel)Mechanical energyDisplayingIroning the clothsDrying up of pappad inCooking food using biogas (Gober gas)Glowing of an electric bulb by rotating turbine. |
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| 19. |
Define biogas (or) gobar gas. |
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Answer» On decaying in the absence of Air, animal dung, plant residues and agricultural wastes produce a gas called biogas (or) gobar gas. |
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| 20. |
Define a hydroelectric power generating station. |
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Answer» The running water hits the turbine with great force, which in turn produces electricity. Such a power station is called hydroelectric power generating station. |
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| 21. |
Distinguish between potential and kinetic energy. |
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Answer» Energy possessed by a body due to its position is called potential energy. Energy possessed by a body due to its motion is called kinetic energy. |
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| 22. |
Define photosynthesis. |
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Answer» Plants prepare their food using sunlight. This process is called photosynthesis. |
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| 23. |
Write any four works done by using electric appliances?1. Washing machine 2. Electric Stove 3. Electric geyser 4. Electric bulb |
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Answer» 1. Washing machine – washing cloths 2. Electric Stove – water food 3. Electric geyser – water heating 4. Electric bulb – light purpose |
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| 24. |
Write any four works you do using muscular energy. |
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Answer» Waling, climbing, pulling, pushing. |
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| 25. |
List the dams built across rivers and hydroelectric power generating stations in Karnataka? |
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Answer» 1. Almattidam 2. Kbini dam 3. MahtmaGhandiTailRace 4. Varahi |
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| 26. |
Write any two works done in your home using heat energy? |
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Answer» 1. Cook food 2. Boil Water |
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| 27. |
Write about any work done by wind energy. |
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Answer» 1. production of electricity from wind 2. people use to make boat and ships to move on the oceans with the help of wind. |
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| 28. |
In which instances do you use muscular energy in your day to day life? |
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Answer» We walk, ran, climb, pull and push the things from one place to another. |
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| 29. |
Write down below about what works are being done in the figure? |
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Answer» 1. Cycle riding 2. Pulling 3. Supplementing the crop with organic or chemical fertilizers for proper growth of the crop. 4. Playing Game 5. Walking with Luggage |
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