Physical Quantities and Measurement

Which of the following numbers shows 4 significant digits?

 
 
 
 

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

 
 
 
 

The number having one significant digit is:

 
 
 
 

Which of the following prefixes represents the largest value?

 
 
 
 

The ratio of millimeter to micrometer is:

 
 
 
 

0.2 mm in units of meters is:

 
 
 
 

A micrometer can be used to measure:

 
 
 
 

9.483 × 10³ m is the standard form of:

 
 
 
 

The number of significant figures in 0.00650 s is:

 
 
 
 

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

 
 
 
 

Which of the following is a base unit?

 
 
 
 

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

 
 
 
 

Question 1 of 13

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