Question

Increasing friction is necessary for which of the following : *

Free wheel of bicycle

Bicycle Handle bar

Chain of bicycle

Ball Bearing in front wheel

15. Which of the following action does not increase friction: *

Treading Tyres

Grinding on stones

Making spikes on shoes

Powdering a carrom board

16. The body will move only when: *

Force of friction = applied force

Force of friction < Applied force

Force of friction > applied force

All of the above

17. Which of the following is not a fossil fuel: *

Coal

Petroleum

Natural gas

Nuclear fuel

18. The major constituent of biogas is: *

Methane

Ethane

Propane

Butane

19. The process by which energy is produced in the sun is : *

Nuclear Fission

Nuclear Fussion

Both

Combustion of hydrogen

20. Which of the following is the ultimate source of energy for us: *

L P G

Nuclear

solar

CNG

21. An ideal Source of energy should have: *

High calorific Value

​

Answer 1

Answer:

1. free wheels of bicycle
2. Treading Tyres
3. Force of friction < Applied force
4. nuclear fuel
5. Methane
6. Combustion of hydrogen
7. solar
8. High calorific Value

Explanation:

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Answer 2

Answer:

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