September 28, 2012

Write down the methods of measurement and explain them.

The methods of measurements are classified into two categories- 
a) Direct methods and 
b) Indirect methods. 

Direct methods: In these methods, the unknown quantity is directly compared against a standard. The result is expressed as a numerical number and a unit. Direct methods are quite common for the measurement of physical quantities like length, mass and time. 
Indirect methods: These methods are apply in which measurement by direct method are not possible, flexible and practicable. This method includes always error in measurement.


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