Physical Quantities and Measurement

A micrometer can be used to measure:

 
 
 
 

The instrument that best measures the internal diameter of a pipe is:

 
 
 
 

0.2 mm in units of meters is:

 
 
 
 

The ratio of millimeter to micrometer is:

 
 
 
 

Which of the following numbers shows 4 significant digits?

 
 
 
 

Amount of a substance in terms of numbers is measured in:

 
 
 
 

Which one of the following units is not a derived unit?

 
 
 
 

Which of the following is a base unit?

 
 
 
 

The least count of a screw gauge is 0.01 mm. If the main scale reading of the screw gauge is zero and the third line of its circular scale coincides with the datum line, then the measurement on the screw gauge is:

 
 
 
 

The number of significant figures in 0.00650 s is:

 
 
 
 

Which of the following prefixes represents the largest value?

 
 
 
 

9.483 × 10³ m is the standard form of:

 
 
 
 

The number having one significant digit is:

 
 
 
 

Question 1 of 13

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  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.
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  19. Q.10 Why do we need to consider significant digits in measurements?
  20. Q11. How random error can be reduced?