Physical Quantities and Measurement

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 prefixes represents the largest value?

 
 
 
 

Which of the following numbers shows 4 significant digits?

 
 
 
 

A micrometer can be used to measure:

 
 
 
 

The ratio of millimeter to micrometer is:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

The number having one significant digit is:

 
 
 
 

9.483 × 10³ m is the standard form of:

 
 
 
 

0.2 mm in units of meters is:

 
 
 
 

The number of significant figures in 0.00650 s is:

 
 
 
 

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

 
 
 
 

Which of the following is a base unit?

 
 
 
 

Question 1 of 13

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