Basic Units and Prefixes for Tripura PSC Exam

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Units of measurement

Base units

The International System of Units (System International d ‘Unites’ ) is founded on seven base quantities, which are assumed to be mutually independent. These base units are:

The International System of Units
Base quantitySI hast unitSymbol for unit
Length Metre
Mass Kilogram
Time Second
Electric Current Ampere
Temperature Kelvin
Amount of substance Mole
Luminous intensityCandela

Prefixes

Prefixes are used to form decimal multiples and submultiples of Si units. The common prefixes are:

Prefixes Are Used to Form Decimal Multiples and Submultiples of Si Units
FactorPrefixSymbol
teraT
gigaG
megaM
kilok
hectoh
dekada
picop
nanon
microμ
millim
centic
decid

The symbol for a prefix is combined with the unit symbol to which it is attached to form a new unit symbol, e. g. kilometer (km) , milligram (mg) , microsecond (μs) .

Developed by: