Important SI Units for Competitive Exams 2024: Here we provide you a detailed list of important SI units for competitive exam 2024 and a list of units in physics. Before moving on to the Important SI Units for competitive exams 2024 the candidates must know about units and their systems. They should know about SI units and why SI units are used for a clear understanding of Important SI Units for competitive exams 2024. The candidates appearing for different competitive exams will face a section called general knowledge. In static GK, the exam covers a topic about the important si units and si units in physics. It is a well-known fact that static GK is a difficult section in competitive exams. Even though candidates prepare well, it is tough to score marks in this section. So you have to increase your preparation time and dedication to score well in this section. Devote a lot of time to each static GK topic. We are here to support you with the list of SI units. On continuous preparation, you can easily answer questions regarding the list of important SI units in competitive exams 2024.

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SI Units: Important SI Units for Competitive Exams 2024

Clearing competitive exams is becoming tough nowadays because of the general knowledge section. Static GK is tough to score marks but it is an art. Dedication and concentration can make you score more marks. In static GK, the exam covers a topic about the important si units for competitive exams pdf and si units in physics. Before moving to the topic candidates should know what SI units are and why it is used.

Units: SI Units for Competitive Exams PDF

SI units are also called the unit of measurement. A standard amount of physical quantity, such as length, mass, energy, etc specified multiples which are used to express the magnitude of that physical quantity. For instance, the unit of time is second.

Fundamental Units: Important SI Units for Competitive Exams 2024

Fundamental units are units adopted for the measurement of a base quantity. The fundamental unit for a particular quantity is chosen for the convention. There are seven fundamental units in the system and they are

• Length - metre

• Time - seconds 

• Amount of substance - mole 

• Electric current - ampere 

• Temperature - kelvin 

• Luminous intensity - candela 

• Mass - kilogram 

Derived units: Important SI Units for Competitive Exams 2024

A derived unit is a unit of measurement obtained by the multiplication or division of the base units of a system without the introduction of numerical factors. A unit derived from the fundamental units of length, mass, and time. Examples of derived units are

• Force - newton 

• Pressure, stress - pascal 

• Energy, work, heat - joule

• Power, radiant flux - watt

• Area - square metre

• Volume - cube metre

and many more.

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System of Units: Important SI Units for Competitive Exams 2024

A system of units is a set of related units that are used for calculations. Below stated are some of the internationally accepted systems of units

 

CGS System -centimeter gram second system: Physics SI Units table 

A metric system of measurement that uses the centimeter, gram, and second for length, mass, and time accordingly. It is commonly used in theoretical physics

 

MKS System- Metre-Kilogram-Second System

A metric system that uses meters for length, kilograms for mass, and seconds for time and it is generally used in engineering and beginning physics.

 

FPS System- Foot-Pound - Second System: Physics SI Units table 

A system of units that builds on three fundamental units; the foot for length, the pound for either mass or force, and the second for time. It is used for official and conventional purposes.

 

SI Units: Important SI Units for Competitive Exams 2024

SI Unit is an international system of measurements that are used universally in technical and scientific research to avoid confusion with the units. It is important to have a standard unit system because it helps the entire world to understand the measurements in one set of unit systems. The SI unit was established in 1960. There are two types of SI units and they are base SI units and derived Si units.

 

Why SI units are important?

• SI unit system is based on precise and definite standards.

• The base used in the SI system is 10 which makes the conversion easier.

• Latin and Greek prefixes are used in the SI system and these refer to the numbers.

• Without the use of conversion factors, the SI units can be derived from one another.

 

SI Units for Competitive Exams PDF Download Link

Download the SI units list pdf for various competitive exams through the direct link provided here. The SI units physics ssc are available in this si units for competitive exams pdf.

SI Units for Competitive Exams PDF

Important SI Units for Competitive Exams 2024: Base SI Units

The SI base units are the standard units of measurement defined by the International System of Units(SI) for the base quantities. These are a basic set from which all other SI units can be derived. Seven base quantities are mutually independent and the SI units for base quantities are explained with symbols in the table below.

 

Important SI Units for Competitive Exams - Base SI Units
Base Quantities	Physics SI Units Table	Symbol
Length	meter	m
Mass	kilogram	kg
Time	second	s
Electric current	ampere	A
Thermodynamic temperature	kelvin	K
Amount of substance	mole	mol
Luminous intensity	candela	cd

 

Important SI Units for Competitive Exams 2024: Derived SI Units

SI-derived units are units of measurement derived from the seven base units specified by the International System of Units (SI). They are either dimensionless or can be expressed as a product of one or more base units. It is scaled as an appropriate power of exponentiation. The important derived SI units are given below with their symbol.

 

Important SI Units for Competitive Exams - Derived SI Units
Derived Quantities	Physics SI Units Table	Symbol
Area	Square meter	m2
Volume	Cubic meter	m3
acceleration	Meter per second square	m/s2
Wave number	Meter inverse	m_1
Mass density	kilogram per cubic metre	kg/m3
Specific volume	Cubic metre per kilogram	m3/kg
Current density	ampere per square metre	A/m2
Magnetic field strength	ampere per metre	A/m
Amount of substance concentration	mole per cubic metre	mol/m3
luminance	candela per square metre	cd/m2
Mass fraction	kilogram per kilogram which is represented as 1	kg/kg = 1

 

Derived units with special names and their symbols are listed in a table.

 

Important SI Units and Symbols
Names of the quantities	Units			Symbols
Plane angle	radian	rad	m - m-1= 1	_
Solid angle	steradian	sr	m2- m-2	_
frequency	hertz	Hz	–	s-1
force	newton	N	–	m.kg.s-2
Pressure, stress	pascal	Pa	N/m2	m-1kg. s-2
Energy, work, the quantity of heat	joule	J	N.m	m2kg. s-2
Power, radiant flux	watt	W	J/s	m2kg. s-3
The electric potential difference, electromotive force	volt	V	W/V	m2kg. s-3.A-1
capacitance	farad	F	C/V	m-2kg. s4.A2
Electric resistance	ohm		V/A	m2kg. s-3.A-2
Electric conductance	siemens	S	A/V	m-2kg-1. s3.A2
Magnetic flux	weber	wb	V.s	m2kg. s-2.A-1
Magnetic flux density	tesla	T	Wb/m2	kg. s-2.A-1
inductance	henry	H	Wb/A	m2kg. s-2.A-2
Celsius temperature	Degree celsius	°C.	–	K
Activity	becquerel	bq	–	s-1

 

The advancement physics refers to the advanced quantities and they are given below with their symbols.

 

Special names of quantities	Physics SI Units Table	Symbol
dynamic viscosity	pascal second	Pa·s
moment of force	newton metre	N·m
surface tension	newton per metre	N/m
angular velocity	radian per second	rad/s
angular acceleration	radian per second squared	rad/s2
heat flux density, irradiance	watt per square metre	W/m2
heat capacity, entropy	joule per kelvin	J/K
electric charge density	coulomb per cubic metre	C/m3
electric flux density	coulomb per square metre	C/m2
permittivity	farad per metre	F/m
permeability	henry per metre	H/m
specific energy	joule per kilogram	J/kg
thermal conductivity	watt per metre kelvin	W/(m·K)
energy density	joule per cubic metre	J/m3
electric field strength	volt per metre	V/m
molar energy	joule per mole	J/mol
molar entropy, molar heat capacity	joule per mole kelvin	J/(mol·K)
exposure (x and rays)	coulomb per kilogram	C/kg
absorbed dose rate	grey per second	Gy/s
radiant intensity	watt per steradian	W/sr

 

Physics Important SI Units for Competitive Exams 2024: UPSC, SSC

The candidates appearing for different competitive exams like UPSC and SSC will face a section called general knowledge. In static GK, the exam covers a topic about the important si units and si units in physics. It is a well-known fact that static GK is a difficult section in competitive exams. Even though candidates prepare well, it is tough to score marks in this section. So you have to increase your preparation time and dedication to score well in this section. Devote a lot of time to each static GK topic. We are here to support you with the list of SI units in Physic that is frequently asked for UPSC and SSC.

 

Quantity	Physics SI Units Table	Symbol
Length	metre	m
Mass	kilogram	kg
Time	second	s
Work and Energy	joule	J
Electric current	ampere	A
Temperature	kelvin	K
Luminous Intensity	candela	cd
Angle	radian	rad
Solid angle	steradian	sr
Force	newton	N
Area	square metre	m2
Volume	Cubic metre	m3
Speed	metre per second	m s-1
Angle velocity	radian per second	rad s-1
Frequency	Hertz	Hz
Electric charge	coulomb	c
Potential difference	volt	v
Electric resistance	ohm
Electrical capacity	farad	F
Magnetic induction	henry	H
Magnetic flux	weber	Wb
Luminous flux	lumen	lm
Intensity of illumination	lux	lx
Wavelength	Angstrom	A
Moment of inertia	kilogram square metre	kgm2
Momentum	Kilogram metre per second	kgms-1
Impulse	newton second	Ns
Angular momentum	kilogram square metre per second	kgm2/s
Pressure	pascal	pa
Power	watt	W
Surface tension	newton per metre	Nm-1
Viscosity	newton second per square metre	Nsm-2
Thermal conductivity	watt per metre degree celsius	W/m C
Specific heat capacity	joule per kilogram per Kelvin	Jkg-1K-1

 

Use of SI Units In Our Daily Lives: Important SI Units for Competitive Exams 2024

• They are common to the people of the entire world so that people from different countries can communicate with each other conveniently regarding business and science.

• It makes systematic use of prefixes, making it easy to express very large or very small numbers.

• It makes calculations very fast.

• SI units are interrelated in such a way that one unit is derived from other units without conversion factors. SI is used in most places around the world, so our use of it allows scientists from disparate regions to use a single standard in communicating scientific data without vocabulary confusion. SI units are important because these are common to the people of the entire world so that people from different countries can communicate with each other conveniently regarding business and science. It makes systematic use of prefixes, making it easy to express very large or very small numbers.

 

We hope this article has been useful for the candidates who are appearing for competitive exams. Most of the competitive exams are tough and the competition for passing exams is very high each year. Static GK is tough to score marks but it is an art. Dedication and concentration can make you score more marks. In static GK, the exam covers a topic about the important si units and si units in physics. Make sure before appearing for any competitive exam know all the SI units given in the article and crack the general knowledge section successfully.

 

Important SI Units for Competitive Exams 2024: FAQs

Q. What is the importance of SI units in physics?

SI units are important in our daily lives because they are common to the people of the entire world. So that people can communicate conveniently with each other regarding business and science. It is an easy way to express very large numbers and even very small numbers.

Q. What is the unit of speed?

Speed is a derived quantity and the unit of speed is metre per second which is represented as m/s.

Q. Why is the SI unit of time second?

The second was formerly defined as 1/86,400 of the mean solar day, the average period of rotation of the earth. This represents the sole definition of seconds in SI units.

Q. Which unit is the biggest unit of length?

Kilometers are the longest unit of metric measurement. It is abbreviated as km. like miles Kilometre is used to measure length.