Conduction, Convection and radiation || Modes of heat transfer || Hindi || Conduction in hindi
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- Опубликовано: 7 ноя 2019
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Let us discuss conduction convection and radiation
these are three modes of heat transfer
#Conduction
#Convection
#Radiation
What is Heat?
Heat is a form of energy. It derives its origins at the molecular scale. Molecules of a substance vibrate at their positions either fixed or not when energy is supplied to them. As they vibrate they transfer their energy to the surrounding molecules causing them to vibrate as well.
Conduction is the transfer of thermal energy through direct contact. Convection is the transfer of thermal energy through the movement of a liquid or gas. Radiation is the transfer of thermal energy through thermal emission
Examples of Convection
Boiling water - The heat passes from the burner into the pot, heating the water at the bottom. ...
Radiator - Puts warm air out at the top and draws in cooler air at the bottom.
Steaming cup of hot tea - The steam is showing heat being transfered into the air.
Ice melting - Heat moves to the ice from the air.
What is the main difference between conduction and convection?
Difference Between Conduction, Convection and Radiation. While conduction is the transfer of heat energy by direct contact, convection is the movement of heat by actual motion of matter; radiation is the transfer of energy with the help of electromagnetic waves
Which is faster conduction or convection?
Whereas conduction is a static process, convection is a more efficient method of heat transfer because it adds the element of motion. A convection oven heats food faster than an ordinary one because it has a fan that blows the hot air around.
Radiation
Radiation is the fastest mode of transfer of heat, because radiation travels at the speed of light, which is very quick. The slowest mode of transfer of heat is conduction because it takes place from particle to particle.
What is the difference between conduction and convection?
In conduction, heat transfer takes place between objects by direct contact. In convection, the heat transfer takes within the fluid. The heat transfer occurs through a heated solid object.
Conduction
Conduction is the method of transfer of heat within a body or from one body to the other due to the transfer of heat by molecules vibrating at their mean positions. The bodies through which the heat transfer must be in contact with each other. There is no actual movement of matter while transferring heat from one location to the other.
Conduction occurs usually in solids where molecules in the structure are held together strongly by intermolecular forces of attraction amongst them and so they only vibrate about their mean positions as they receive heat energy and thus pass it to the surrounding molecules by vibrations.
Convection
Convection is the mode of heat transfer which occurs mostly in liquids and gases.In this method, heat transfer takes place with the actual motion of matter from one place within the body to the other. Often when we boil water we have seen bubbles and currents develop in the water on careful observation.
What are the three types of heat transfer and examples?
The three types of heat transfer
Ces
Convection
Natural & Forced convection
Radiation
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We put heater down
@@rajwardhansinghrathore7863 Glad to help you
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Apko kon suggest kiya tha ki aap teacher Baan sakatey ho..Aap achha explain v nahe kar paa rahe hai.. Sirf youtube par paisa kamane k liye video Bana rahe hai kya ..
Or Dislike button ko off kar k rakha hai..Taki koi dislike na kar sake ...You are Vulgar
@@manishrahi2529 i didnt do this
and even on youtube there is no setting to off dislike button only
Kyi famous teachers ne ek ek ghnte lga diye Hain itne choti si chiz ko pr tb bhi smjh nhi aaya sir aur apne 12 min. Ki video m hi poora concept Clear krdiya hats off sir
Smjh bhi aa rha h or mja bhi!
☺️🧡 You are such a incredible teacher!
Glad to help you
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Reality wonderful 🎉🎉❤❤❤
Sir i am an arts background student, but your lucid language and simple examples were helpful to understand this concept.. Thank you so much Sir 🙏
Me too bro
I have seen lots of videos for understanding this concept better but finally now I am clear this concept as what I want to know and now I am so much satisfied 😊
You are a real teacher. Thank you sir.Good explanation.
Op
Right
Right
Heater should be adjusted in lower because heat throw hot air and it is lighter than cool air .so that hot air go up.and room will be hot 🔥
Great sir your explanation is perfect
S
That's right you are intelligent
Nice to meet you
Thanks
Good luck for your tommorow exam
Thanks
Thanks sir ji
Thank you dear...
Thank you sir
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Tomorrow is my sci paper and I was in doubt "what is convection?" But now I understand the concept easily bcoz of u... Thank you so much Sir.✌️
I was confused about convection but this man cleared all the confusion Thanx
Heaters ko niche lagayenge taaki uski garm hwa upr uthe.. Aur pure room ko niche se upr grm kre.. 2nd. Niche ki thandi hwa ko grm kre.. Agr hm heater ko AC ki jagah lga denge to Room sirf Upr m hi grm hoga.. Just like vice-versa as AC
Bhut bdiya answer
sir, jis tareeke se samjhaya aapne practically... bahut hi badhiya tha sir.. sach batau to abhi tak RUclips par aapke jaisa teacher nahi dekha. 🙏 pranam
Heater is installed at lower part of the room because heat circulates at all parts of the room due to less density 👍🤞
554🎉
Sir u r genius, intelligent and best teacher in the world 😜😘😝😸😸👆👆☝️☝️.
सर मैं आपकी तीसरी बार वीडियो देख रहा हूं जो की काफी बढ़िया हैं।
Superb explanation about convection, now i understood clearly.
Whenever I need mechanical knowledge.. firstly I found out your video.. they're so much helpful in this pandemic situation.. thanks a lot sir :)
😂 same here
Hii aditi
Thank you sir...Your way of explanation is awesome...You make confusing concepts easy to understand...😊
Thank you sir it's very help ful for the students who do not much time to read book Or to watch 1/2 hours videos on single concept.. Thank you sir..
One of the best lecture on transfer of heat 🔥🔥
Waaooo... great sir👌
Love ur way of explaining ♥️
Thank you
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Sir , we will put heater downwards means if we put heater up the heat will remain upside because the heat is lighter in weight , so we will put heater down thus, the heat will remain down in winter. Thankyou for teaching an
easy concpet.
Yes,I agree 👍nice catch and good explanation
Pr agar hum upar heater lgayege to warm heat light neche chli hi jaayegi
Perfect knowledge of sir In heat and mass transfer unbelievable
I understand it very clearly sir,thanks
8:54 sir heater ko niche lagana chahiye bcz warm air is lighter than cold air
Best explain sir 👍👍 . Example sabshe acha tha sir .
Very easily explain this topic , Thanks Sir 🙏🙏❤️
Sir you are a legend
Thx
Aapane Sahi kaha tha ki definition apne aap hi likh doge .
Niceee video
Exemplary way of teaching ever seen and loved it from memory.
Excellent explaination with real life example
Excellent
Thanks
Amazing way of teaching and explaining the concept
Your explanation is too good. 👏☺️
Thank you.👍
Use of animation was done beautifully to explain the concept.
We kept the room heater on the ground because the hot air is light and the cold air is heavy, so that's why we put the room heater on the ground.
Thank you sir bht achi smjh ae apki video ki
Samjh bhi aiy our mazzah bhi aya buhuth zyada mazaha and understanding hoy sor
My teacher explained me this but I couldn't understand this so I found your video on RUclips and now I understood the concept very well....Thank you so much...You are the real teacher and Happy teacher's Day 🎉🎂
Uppar lowest part mai sir ji.
Heater will be placed in the lower part because the high temperature air will travel upwards n convection will occur..am I right? Thankyou sir...good explaining
Thanku sir 🙏. App bahut hi atchi tarah se samja te hai. Very simple method 👌 se
Dhamakedar video. Thanks sir
thank sir, Amazing way of explaining
Hii
Amazing way of ur explaining 👌
Hello anjali
Wahh sir ek baar m hi smjha diya... 🥰👍
Sir akdom clearly samaj aaya mainly appka Jo example he na o example se atche se samaj ata he ☺️love from Assam 💗
Neeche lagana chahiye sir. Because hot air is lighter than cool air if the purpose is warm the room we have to install the heart in down side so that we can achieve 100 percentage efficiency of heater 😄
What a lecture ! u had a best life experience, bahut achaa.
Neechee
God bless u, bia, great 👍
Thanks a ton
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Aap ki video bhut achi h jldi smj m aa jati h or aap k example A1 hai❤
Sir aapka video bahut helpfull hai
Tnq sir
Explain karne ke saath ek study story 🤣🤣🤣🤣🤣. Leave it. Thanku sir for explaining this topic . 👌👌👌😊😊😊. Again thanku. Perfect explaining.
Aise maza agaya 🤣 story sun kar
In the winter season we must keep room heater at the floor because heater create hot air and due to convection that hot air goes upword that's why what happens ,that room temperature will remain steady . If we didn't this heater fit to the selling then hot air will stay at upper part of room and bottom portion remain cooled .There will not done process of convection.
smajh aa gya sir g
Is topic ne bachpan se pareshan kia tha ❤
bhai I love your explanation style which is very easy to understand .thank u
As told by the sir about the convection so in my opinion heater should be placed in the medium and on the floor so sothat cold air could be replaced by hot and and the conversion could happen at faster rate at downwards that could circulate up as in this way process of convection could take place
Excellent
1 second k liye bhi bore nhi hui me i m just search this topic 4 competitive exams but i really enjoy it😀😀 kas school clgs me bhi sab aisw teachers or professor hote
Love you sir keep growing we will support you dont stop making this short concept clearing videos ❤❤
Very very very very knowledgeable and interesting lecture ........thnk uuuu sir
Sir heater niche lagana chahiye kyunki Hot air wheight me halki Hoti hai isliye ye uper jayegi Agar heater uper Laga to Heater ki farm hawa uper hi Raj jayegi niche nahi ayegi. Isiliye Room garm nahi hoga.
👍👍
Sir thank you so much you really explain as we can understand may God will spread your channel so that you can upload more and more videos for our help
God is within everyone
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Channel apne aap grow kar jayega
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Sorry no
Thank you sir.
It is my first comment in you tube video.
Because this video is very helpfull for me.
thank u sir.hum bhi sarr pakad k bethe the arrohi mam ne kuch pdhya.Apki video dekh ke motivation mili h ki kal pass hojayege.Sir ap ajao pdhane arohi mam ko niklwadege.from Ncu gurgaon
Sir you are the best teacher ❤
Huge respect from 🇧🇩
Heater should be installed in lower part of room so that hot air will be circulated all around the room
Speechless level of teaching sir💐💐💐💯
Woow.... A single videos clear concept
Sir heater ko neeche lagaya jana chahiye
Jisse cold air garm ho sake
Well .... during this corona pandemic.....we are attending online classes and it's really hard to understand any topic through online mode because some time there is network issue and we r not able to attend classes on time .......but thx to ur videos I'm able to understand every topic easily. With examples it easy to understand any topic and ur examples are very easy to understand so thank you sir 🙏
Glad to help
Where are you studying
Which college?
Tnx sir Techrday ki tyari me aapka video bahut kam aaya❤️💕
Great explanation sir🙏
Heater is adjusted in lower part of the room coz as heavier particles sink in the room the will be converted in lighter particles ( i. e . They will be heated).
Heater should place at lower position because when heater will release hot air it will goes up and entire room will be going to hot after some while
Thanku sir thanks a lot
Mai science ki student hu
Bs books ki defination rat kr aaj job v hasil kr li lu pr seriously mujhe conduction kya h ye pta nh tha.aaj mai sochi ki books read krti hu Suru se par def se aaj v clear nh ho pai...fir avi Maine aapka vedio dekha ...tb myjhe sahi se samajh aaya
Thanks a lot
Sir, bahut acche se samjhaya aapne
You are doing great 👍
I am diploma in mechanical engineering student
And i am not from English medium
So I can't understand in class.
But after watching your video
I am totally clear .
Do 1 video on measuring instruments
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@gear.institute sir i am in poor family, my college fees is 48000 annual so i can't pay
Your fees in apk .just do videos on
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@@kalpeshmhatre3452 i was kidding
Aapne bola fees ke baare mein isliye
48000 rs mein kuch nahi padhate
Aur hum 300rs mein sab padha dete hai
@gear.institute fri toh koi problem nahi hai
@@gear.institute 😂nice sir
HEATER SHOULD BE IN THE LOWER PART OF THE ROOM
Very nice explanation sir, thank you
Tq sir ji 🙏 that is very simple and very nice full example
Sar heater niche lagana chahie
Puch rahe ho ki bata rahe ho
Ans-Ha
Heater niche lagna chahiye sir
Yes
It is really fun to learn with you sir
Hitter down⬇
I am Muslim and I know you are non Muslim but I like your lecture muje achi tara samj ha gaya ha Mai na apka chanal like or ball icon daba diya
Jai siya ram
Ye kuch nhi hota Muslim or Hindu
Teacher mein bhi religion dekh kar Gyan lete hain . Bewakoof log 😕
Kaha se aate ho 😂😂
Manhus aadmi
सारे मुस्लिम अच्छे नहीं होते हैं
Thanks for such beautiful explanation....
Really best understand by you 👍
You are very talented sir.thnku
Very good and clear video sir. 😇☺
Thnkz ,for clear my doubt
Thanks a million sir this video is very useful for me
Thanks sir bhot achchi example di aapne sab clear kar diya🙏
amazing explanation with examples.
Thank you very much for this video this really help me
U made this soo easy thanku
Thank you so much sar aapane bahut achcha samjhaya Dil se respect hai aapko ❤️❤️
Great teaching in simple way 🎉
Thank you so much sir you really helped alot during preparation of exams
Very nicely explained sir... 👍👍
Really great Sir
Thank you sir for such a nice explanation.
Wah sir hila diye!!
Sir aap great ho
Thanks Mera project complete ho gaya