Physics Knowledge Online Test

1. The silvered surface of thermos flask prevents transfer of heat by:
 
 
 
 

2. On which principal does the tape-recorder function?
 
 
 
 

3. Sound travels fastest through:
 
 
 
 

4. A plant with green leaves placed in red light will appear:
 
 
 
 

5. Which meta is commonly used as a electromagnet?
 
 
 
 

6. Electromagnetic wave travel with the:

 
 
 
 

7. The wave which do not require any medium is:
 
 
 
 

8. Sound travel faster in:
 
 
 
 

9. The common refrigerant used in the domestic refrigerator is:
 
 
 
 

10. In the process of galvanization an iron sheet is coated with:
 
 
 
 

11. Colours seen on oil film spread on water are seen because of:
 
 
 
 

12. Who said, ‘A body will remain at rest unless an external force acts on the body’?
 
 
 
 

13. A fuse wire is used to:
 
 
 
 

14. Energy of a body due to its motion is called:
 
 
 
 

15. The tendency of a liquid drop to contract and occupy minimum area is due to:
 
 
 
 

16. When a constant force is applied to a body it moves with uniform:
 
 
 
 

17. Which mirror can be used to focus sunlight?

 
 
 
 

18. Which of the following does not admit any division?
 
 
 
 

19. Which of the following is a good conductor of electricity?
 
 
 
 

20. What is the melting point of Tungsten?
 
 
 
 

 

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