Physical Quantities and Measurement

The number having one significant digit is:

 
 
 
 

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 ratio of millimeter to micrometer is:

 
 
 
 

0.2 mm in units of meters is:

 
 
 
 

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

 
 
 
 

Which of the following numbers shows 4 significant digits?

 
 
 
 

Which of the following is a base unit?

 
 
 
 

A micrometer can be used to measure:

 
 
 
 

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

 
 
 
 

Which of the following prefixes represents the largest value?

 
 
 
 

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

 
 
 
 

9.483 × 10³ m is the standard form of:

 
 
 
 

The number of significant figures in 0.00650 s is:

 
 
 
 

Question 1 of 13

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