Name: Units of Measurement
Uploaded: 2019-07-19
Duration: 2 min 13 s
Description: We mention many physical quantities in routine conversations. These physical quantities have units with numerical values. Let's recall some units of measurem...

Question

Mention the various system of units in use and describe the SI system in detail.

Accepted Answer

The various system of units used are :

(i) The Centimetre Gram Second system of units(abbreviated as $CGS$ ) is a system based on the centimetre as the unit of length, the gram as the unit of mass, and the second as the unit of time.
(ii) $MKS$ is the system of units based on measuring lengths in meters, mass in kilograms, and time in seconds.
(iii) The foot pound second system or $FPS$ system is a system of units built on the three fundamental units foot for length, pound for mass and second for time.

SI system of units:

SI unit is an international system of measurements that are used .A standard unit system is important because it helps the to understand the measurements in one set of unit system. There are seven base units. Following is the table for base SI units for seven fundamental quantities with symbols:

S.N. Physical quantity SI unit Symbol

1. Length Meter m

2. Mass Kilogram kg

3. Time Second s

4. Electric Current Ampere A

5. Thermodynamic temperature Kelvin K

6. Amount of substance Mole mol

7. Luminous intensity Candela cd

Mention the various system of units in use and describe the SI system in detail.

Important Questions on Units : Fundamental and Derived Units

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