Physical Quantities and Measurement

The SI unit of pressure is:

 
 
 
 

Which one of the following prefixes represents the smallest value?

 
 
 
 

Which of the following is NOT a base quantity?

 
 
 
 

If an object moves with constant speed in a circular path, its velocity:

 
 
 
 

The standard unit of electric current is:

 
 
 
 

Which instrument is most suitable for measuring the diameter of a thin wire?

 
 
 
 

The SI unit of power is:

 
 
 
 

The number of significant figures in 0.02050 is:

 
 
 
 

One micrometer is equal to:

 
 
 
 

The least count of a vernier caliper is:

 
 
 
 

Question 1 of 10

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  10. Q.1 How does physics play an important role in our life?
  11. Q.2 Estimate your age in minutes and seconds.
  12. Q.3 What base quantities are involved in these derived physical quantities; force, pressure, power and charge.
  13. Q.4 Show that prefix micro is thousand times smaller than prefix milli.
  14. Q5. Justify that displacement is a vector quantity while energy is a scalar quantity.
  15. Q6. Screw gauge can give more precise length than vernier calipers. Briefly explain why?
  16. Q.7 Differentiate between Mechanical Stopwatch and Digital Stopwatch.
  17. Q.8 How measuring cylinder is used to measure the volume of an irregularly shaped stone?
  18. Q.9 What precautions should be kept in mind while taking measurements using a measuring cylinder?
  19. Q.10 Why do we need to consider significant digits in measurements?
  20. Q11. How random error can be reduced?