hello are you all excited and measurement andap basap so shall we all get started w rul nitish w nice to see you Rockstar Jan Mohammad neat aspir you guys are very good for your board exam preparation neat preparation and Foundation s so in the channel useful so that all of us as one big family shall we get into it I'm telling you absolutely a comp exams in the lectures are very useful Basics minim Maxim you will enjoy the future chapters what are the types of physical quantities seconds l met explain the story behind Okay third part is very important okay great so arama shall we get started very good so back what are the types of physical quantities di di maybe I will take started this so please follow physics physics physics is similar only the line we will talk very good quantities there are basically two types of quantities one physical quantities in non physical quantities physical quanti whatever you can measure for example physical quantity so quantities can be of two types one is physical and non-physical So Physical quantities are those which can be measured for example temperature we measure length meas temperature measure what are the other examples I want you guys to answer chat very good very good very good distance meas angle meas current me you guys are awesome luminous intensity gravity meas I want you to think I want you to think very good Sur Babu Sur Babu on the spot correct anger anger love emotion smile Beauty intelligence what is beauty sir rate of 1 to 10 exactly so happiness emotion love and anger and beauty meas we call non physical quantities whatever cannot be measured okay we saw already whatever can be measured and physical quanti are you ready shall we get started very good super is beauty of a person a physical qualtity yes or no quauty Beauty very good soang Beauty cannot be measured okay you cannot measure because so beauty is in the of the beholder so beauty is in the eye of the beholder it is no it is not a physical quantity correct great very good so everybody listen carefully so fundamental physical quantity fundamental physical quantity derived physical Bas physical quantities and der physical for isal everybody has decided for the last 300 400 years so fundamental length is a fundamental unit mass is a fundamental unit time is a fundamental physical quantity electric current is again fundamental physical quantity temperature is a fundamental physical quantity amount of substance Mo it is a fundamental physical qualtity luminous intensity it is also a fundamental physical quantity they decided by convention they fixed f by time correct velocity is Distance by time sir distance l so L by time velocity lamental how many of you are able to understand sir displacement by time sir day it's okay okay correct velocity is displacement by time I'm checking only the Dimension you are right displacement is correct but I am focusing on units okay everybody please let me know quickly very good it is a derived quantity so velocity L time current depends on charge and time sir current fundamental derived physical quantity derived physical quantity which depends on elect current and are you all able to understand this is what we have assumed they are fixed as the base quantities base quantities base quantities or fundamental physical quantities very good DS DS super yeah very good exactly Rahul you are right okay luminous so it is the amount of intensity energy transmitted per unit area per unit stere angle so it is something related to waves length mass time current temperature amount of substance we don't use the last okay shall we all go forward so volume it is length into length into length so volume is also a derived unit are you all able to understand very good super very good very good so fundamental and derived so speed is equal to Distance by time so speed derived physical quantity yeah it depends on fundamental physical by fundamental physical so speed is a derived physical quantity yeah it depends on fundamental physical quantities length and time okay so it depends on fundamental physical then you call it derived length mass time electric current temperature amount of substance luminous intensity what about okay very good super very very good you guys are awesome everyone please let me know quick quick quick quick very good had girls then we have moan Raj Mohammad Shake Santos super very happy person you guys are amazing let's try to understand derived physical quantity okay so now acceleration sir acceleration is change in velocity by time correct so velocity velocity is uh Distance by time displacement by time okay velocity final velocity initial displacement by time so length by Time and Time time so acceleration is length by Time Square super ah acceleration is length by Time Square super ah so ation depends on length fundamental quantity time fundamental quantity okay so acceleration is also a derived physical quantity okay acceleration is also a derived physical F fundamental quantity okay derived physical quantity okay acceleration density s form very good superity density is mass by volume super M very good level correct correct absolutely right it is mass by volume so density formula density is mass by volume mass m volume length Cube so mass by length Cube so it's a derived physical quantity density depends on mass density depends on length so density is a derived physical quantity force force force FAL Ma so m l by Time Square so Force so force is mass into acceleration acceleration length by Time Square so shall we get started fire very good SOS you are absolutely right good good good very good so pangla note every physical quantity apart from fundamental physical quantities all of them are derived okay very good superb so now let's go forward which of the following is a derived Leng M velocity I want you all to be fast okay so answer is velocity so velocity fundamental fundamental fundamental so derived so answer velocity is the right answer okay velocity is the right answer velocity depends on displacement by time so it is length by Time come on guys pick the derived physical quantity soed electric current is fundamental mass is fundamental length is fundamental so volume is what is derived volume volume length into length into length volume the length Cube volume on the length Cube so volume is a derived physical quantity very good superb now which of the base quantities are used to describe acceleration so acceleration describe base base fundamental B fundamental okay so very good ran JB Stars Palani Anish great great AOS you guys are awwesome dyang so so yes the answer is length and time acceleration is what change in velocity by time change in velocity it is displacement by Time and Time time so acceleration is length by Time Square Dimension acceleration Dimension so answer is option a option A is correct are you all ready shall I move forward un Krishan kandipa un Krishan I will start very soon please wait definite I will do it don't worry great let's go it is called physical quantity andal physical quantity physical quty so and we have for examp 10,000 years let's go to early men okay but anyway let's go 10,000 years before okay so so distance is a measurable quantity so distance is a physical okay let's say but does this mean so unit is a standard amount of a physical quantity or standard amount okay is what stand am weight for example for weight is measured by Stones IND for example so this is a problem which came there should be a common system which everybody has to use so there should be a common system which everybody has to use so did you all like it I hope all of you are clear appreciate you will enjoy the subject so the unit is a standard amount of physical you can measure in weight weight you can measure in kilogram gram standard amount of a physical quantity so we got the way to write physic so 58 K so anyal and unit now U so magnitude is n and u U is the unit okay are you all clear everybody happy very good super super super Square family M they fixed uniform system value number 70 CM sir so 170 magnitude and cim units soical you will have parts Part magnitude part units magnitude UNS are you all clear very good super very good so now let's go forward so in general you have to use this Equity okay yes important magnitude into okay everybody listen carefully everyone quick quick quick quick quick N1 U1 is equal to N2 U2 okay are you all ready yes very good so 5 K let's say okay 58 kg is equal to N2 G okay are you all clear N1 is magnitude of kg you U1 is U2 is G okay we know 1 G is 1 by 1000 kg 1 G is 1 by 1,000 kg are you all able to understand 1 G is 1 1 by th000 kg so kg kg cancel N2 N2 is 58,000 example weight 58 KGS is 58,000 okay are you all clear everybody happy okay 7.3m or in the inch inch scale it is 2.9 in so11 U1 N1 U1 N2 U2 I want you to know this okay are you all clear everybody super yes are you all clear very good very very happy important Basics I hope you're all clear very good very good very good Nix up great great all of you have understood it n super Sur very good that's correct that's the conversion okay to it'll be very helpful for you okay inch to centimeter usual 2.5 yes you are right okay it is 2.54 if I'm not wrong go okay everybody happy with this shall I proceed very good magnitude DS n magnitude units okay very good super so let's go forward so what when people started to travel okay okay they introduce the system of units okay so system international okay system international that is how they said SI okay so it's a standard international unit system which all of us follow okay so they'll give you a bull they used to what they used to have system system deal they brought currency Mass into acceleration change in velocity by time change in velocity by time so Mass and change in velocity velocity cim fo per second okay foot per second and time you can write second you can write minute you can write m k g pounds velocity met per second cim per second feet per second and time you have second minutes hour will be 27 combinations 3 into 3 into comb sir I can write kg m/ second into uh divided by second kg cm/ second divided by second kg feet per second divid by second different combination I will get what I will combinations I get so we need a system they bought in the international standard system SI system international okay so were three common systems M CGS FPS MKS now meter kilogram second CGS now CM G second FPS foot pound second okay so fo cim met L pound m m second okay so in the system us they following it will very good so CGS they are using it in France very good okay meter kilogram Britain Britain they were using it are you all clear very good in America Instagram this is 50 pounds 50 lbs bar 25 lbs lsound okay so America they are more used to pounds for weight measurement kg follows British so number we follow what British did so British people the kilometer meter kilogram second very good yes yes absolutely we bought in the UNS please let me know what is the answer for this K answer K screener answer please let me know what is the right answer quick quick quick quick sir pounds pounds Sur Babu very good ran mes nagul say level very good y keep it up keep it up my dear boys and girls you guys are legendary okay so now but yeah try to solve it answer is b b is absolutely correct very good MKS cim this is right second one is correct C cim G second FPS foot pound second are you all clear cyber shock but Pi is a constant you take any Circle and the circle circumference so is a Conant it will not have UNS very good super very good so let's go forward we will go to okay sir World us England France Australia Germany Russia they will be following one System of Units SI system system international it is very popular used by the scientific community you will write in you will write in units so what are the seven and we have two supplement units what are the seven base quantities we have length mass time electric current then temperature then amount of substance then luminous intensity very goody are very important so I will leave it to you okay I will not force you but NC they would have given you definition it is your so L meter sybol small m m kg kilogram time seconds temperature okay so when I say 273 kin don't say 273 de kin you don't put de you don't put degree you just write 273 CD Electrics I will teach you what is please wait please wait time on the second are you all clear everybody happy super super great great great you guys are awesome now the supplement sir sir angles also is phal you have to Define your fundamental physical quantity they they introduce this supplementary units what is that for angle and for solid angle is for 2D shapes 2D we use angles so PL angles measure we use angle radian Radian fully we will study okay so angle is for 2D 2 so for example I will use radians in the angle measure I will use radians I hope all of you are clear very good forid for solid angle so let's go and have a look PL angle plain angle usually refers to angle in two Dimensions like square triangle Circle Etc like this so if if you have a shape like this what is the relation the relation is r d Theta is equal DS D Theta is equal DS by R this relation is important please remember it I will teach you this in trigonometry sir nice to have you welcome welcome to our Channel shape pizza slice we call this a sector great so sector so sector the in the circumference what angle it subtains at the center of the circle the AR this is AR okay so radius into this angle is equal to AR length radius into included angle radius into included angle is equal to AR are you all clear so radius into included angle is equal to arc length very good [Applause] super 3D shape okay solid angle it is for 3D shapes three dimensional basketball 3D sir okay and cubid spear cone cylinder 3D shapes so 3D shapes we use solid angle solid Angle now usually is for threedimensional figure like a cube cuboid or a spear okay football basketball spear Cube dimensional so thre Dimension figure we use solid angle solid in the angle the angle which is included when you have an area a on the surface so surface okay so solid angle solid angle is equal to area by radius square important area by radius square so solid angle radi Square okay just remember this symbol is same but yeah you don't call it home you call it steradian you call it steradian okay plain angle is radians plain angle is radians and solid angle is Teran okay Tye it f then we'll go for word okay what is meant by light light light sir light not time sir day distance how many of you knew that very good I'm so proud of you all Mitra Rahul nagul sinduja yamuna very good RA nitish Vara ramas Swami nagul vasu sug prya great you guys are legendary anur level Anish so Li here is a measure of distance can you believe that it's a measure of distance it's a measure of distance light is a me of second light will travel 3 into 10 Power 8 m NASA light and the nearest star from Earth distance the nearest star number for proxim very good the nearest star is Proxima Century okay it is 4.3 light years so how many of you feel Amazed by this chat I want you to enjoy nearest so it takes 4.3 light years okay crazy so it's very very far okay so next one everybody please try to solve it so U1 and U2 are the units selected in two systems of measurement and N1 and n are there numerical values numerical values magnitude numerical values magnitude N1 U1 is equal to N2 U2 N1 U1 is equal to N2 U2 formula for converting from one measurement to another measurement I hope all of you are clear let's go forward plain angle and solid angle are primary fundamental units secondary fundamental units supplementary units derived units what is the right answer the right answer is GPR b c they are supplementary units not secondary they are supplementary so PL angle and solid angle they are supplementary units okay I hope all of you are clear let us go forward everybody very good daddy answer is option answer is option A how do you solve it sir CGS units cmet gram so it is gram per CC CC CM Cube CC cubic cm cubic cm CC which is CM Cube okay cc bike 500 cc00 CC and the CC so remember this it is capacity it is capacity it's volume basically okay so it is send M Cube okay very good exactly so g k 1 by K M K second so C by 100 so CM 1 by are you all happy s video light M so this is how you solve it kg per M Cube M Cube me Cube M Cube so5 by 1000 divided by 1 by 100 Cube 1 by 100 Cube 1 by r0 r0 correct so the 1 it will become into r0 by 1,000 into kg per me M Cube so cancel cancel so answer is 500 kg per M Cube you have to use1 U1 is equal to N2 U2 okay are you all clear please go through it okay everybody happy great super day you will have a very good understanding okay is a Qui very good Sur Babu mes Sant very good Sant gutam y YH Ram pra very good sujit very good Tamil Sant Jan super Phoenix nul very good light is a un of okay so it is a measure of distance don't forget that okay diamond but it's okay covered enough I hope you enjoyed so I hope you enjoyed it exam entrance exam whole country should feel literally you rocked it I want you to do well for 11th and 12th also okay yes RAM for sure you can follow okay so thank you so much all the very best the Chanel the table units conversion one second one day one hour is 3,600 seconds okay so lecture two morning around 10 10:30 the follow chemistry so I will teach you chemistry a physics chapters Chemistry chapter okay biap ail okay so plan for theion okay so thank you so much love you all see in the next one I hope all of you are aware telling you here online online okay offline sh Road mad I think it is CH okay and our team will call you and coordinate with you okay so thank you so much love you all see you in the next one all the very best meet meetch March 31st Sunday Sunday okay okay take care guys love you see you in the next one bye-bye