Important SI Units for Competitive Exams 2022: Get to Know Physics SI Units Here

Important SI Units for Competitive Exams 2022: Here we provide you a detailed list of important SI units for competitive exam 2022 and a list of units in physics. Before moving on to the Important SI Units for competitive exams 2022 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 2022. 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 2022. 

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SI Units: Important SI Units for Competitive Exams 2022

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

It is 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 2022

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 2022

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.

 

System of Units: Important SI Units for Competitive Exams 2022

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 2022

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 2022: 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. There are seven base quantities that are mutually independent and the SI units for base quantities are explained with symbols in the table below.

 

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 2022: 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.

 

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.

 

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 2022: 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 2022

  • 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 2022: 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.

 

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