How does an Electric Motor work? (DC Motor)
ฝัง
- เผยแพร่เมื่อ 27 เม.ย. 2024
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This video has been dubbed into a few different languages. You can change the audio track language in the Settings menu.
⌚Timestamps:
00:00 - Intro
00:41 - Circuits
01:22 - Magnets
02:27 - Electromagnets
04:28 - Improvements to Electric Motor
05:00 - Commutator and Brushes
07:19 - Improving Torque
08:20 - Devices with Motors
09:00 - Brilliant
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Special thanks to those that reviewed this video:
Chad Williams
Ben Francis
Kevin Smith
Internet Sources:
electronics.howstuffworks.com...
science.howstuffworks.com/ele...
www.explainthatstuff.com/elec...
• How DC Motors Work -- How DC Motors Work (National MagLab)
• How DC motors and univ... -- How DC motors and universal motors work (Matthias Wandel)
• How does an Electromag... -- How does an Electromagnet work? (Science Buddies)
• How does an Electric M... -- DC Motor Explained - Basic working principle how DC motor works (The Engineering Mindset)
Book Sources:
Schaum's Outline of Basic Electricity, Second Edition by Milton Gussow
amzn.to/37dX2Ae
How Things Work: The Physics of Everyday Life, 4th Edition by Louis A. Bloomfield
amzn.to/2AgiVmf
Electric motor image credit:
By Marrrci - Own work, CC BY-SA 3.0, commons.wikimedia.org/w/index...
Music: (Soundstripe.com)
"Hot Stuff" By Brasko
Made with Blender 2.82a, Cycles Render
Here is some of the gear that I use for animation:
Graphics Card: GTX 1080ti amzn.to/2t70HN0
CPU: i7-8700k amzn.to/2WEk9OE
Motherboard: Asus Prim Z370-A amzn.to/2t4EVth
Microphone: Samson Go Mic amzn.to/2GaSpvV
Mouse: Logitech G600 amzn.to/2UKhf9P
📼Video Summary:
Electric motors can seem very mysterious! How do they use electricity to start rotating? Let's break it down step by step to understand how it works. Topics covered in this video: circuits, current, magnets, electromagnets, armature, commutator, brushes, stator, and rotor. This video only covers DC motors. Maybe I will cover AC motors in a future video🤨
#b3d #engineering #physics - ภาพยนตร์และแอนิเมชัน
the dislikes are probably from the teachers who couldn't explain the lesson as perfect as he did
arouf gangsta
Nailed it 😂😂
I would actually love to see teachers using his videos to teach their classes
2.7K teachers
@No Name What you don’t have a name that’s private.
Got a much clearer understanding of the concept in around 10 minutes, than I ever got in almost 10 years... bravo
😀
Jared sir please make a video on AC generator cuz I'm not able to understand its working
I always see these comments. But I am not sure if there is an element of exaggeration.
Same here. I've been a mechanical engineer for almost 10 years and I've never seen this explained so well.
I have a question that is the electricity is reversed in this explanation then is it not ac motor?
This was so well explained that I don't have words to describe it. My teachers couldn't have explained it as well as this. The animation, the content, the voice. Everything was so perfect!!! ❤️❤️
Thank you Fatima!
I agree.. So perfect.. Now I regret not having studied electricity..
Fantastic❤❤❤❤
@@JaredOwenthanks so much for the knowledge you spread!!
Plz @@JaredOwenwhat the application you used to make this video??
I dont comment too often, especially under educational videos, but sir, I just wanted to say that the way you explain is perfect, I'm so happy that there are high quality teachers like you, congratulations!
Thank you very much Sir❤❤❤😊😊😊
4 years of electrical engineering, and I still need this.
4 yr wasted
Pagal hai kya.... 4 saal se electrical engineering mein kya kar rha tha.... electrical engineering chor ye toh class 10 mein bhi padha hua hai...🤣😂
Same
Me too.
always keep up to date.
Simply perfect. It could be called art. One of the best representation and explanations i have ever watched.
Thank you
could it be called art? I'd say it's better than banana ductaped to a wall
Fax. No printer! Best video on DC motors that I have ever watched.
@Anton Dales tesla invented AC which leads to AC motors, this video is about DC motors
@@danielatkins9551😅
@@antondales7960😅😅😅😅😅😅😅😅😅😅😅
I remember studying about this in my electrical class and was having a hard time visualize the parts in action. It was mostly of text but I couldn't understand the visual function completely. Seeing this, the many missing pieces in my studies started to make so much sense now. Thank you.
A 14 year old learning electromagnetism and this came as a blessing ..
I don't have words to thank you enough ..
Wishes and happiness from apar
I can only imagine the amount of 3D modelling, animation, planning and time required to make a video like this. Not to mention the rendering power. So clear. Thanks alot!
Thanks Bran!
@@JaredOwen no problem, Jared.
@@larbmining Thanks Larb!
@@II_xD_II welcome The 😕
@@JaredOwen make a video on how a generator works.
Oh man...If you were my physics teacher when I was in high school, I would have become a great physicist today. Clear explanation and really easy to follow and understand! Thank you Jared! that was incredible!
You can become now ;)
th-cam.com/video/YIJMf8hPsYg/w-d-xo.html
if you dont understand bad explanations, its not the right profession 😉
Me learning it while in high school
Bruh you are responsible for your own education. Can’t blame teachers if you’re a dumbass
Just started a job at a motor repair company and have been having a hard time understanding how dc motors work and the minute u added commutators it clicked so much more. I look forward to learning and watching many more of your videos
Bro you are amazing. It's incredible how important the visuals are in understanding, something a lecture alone cannot teach.
And that's why Audio-Visual method of teaching is the future of learning.
I agree!
@@JaredOwen Great! You are still replying comments.
@@JaredOwen yep , everyone should
@@JaredOwen nice video
@@JaredOwen You literally taught me more in one video, then 7 years of school. And you have a good song which makes it better
I never understood how motors actually worked and this is actually super easy to understand, thanks man!
Same here, while for ICE I have known for ages how they work, for electrical, in general I did not understand how you turn spinning motion into electricity and then the other way around. Now, next step is to understand solar panels, as apparently, th use some chemical process to produce the electricity
th-cam.com/video/yfeDqNNP7Ek/w-d-xo.html
This is the best description of how a dc motor works. Ive been studying electronics for a while and i never really understood how a brushed dc motor works, but now i do. So thankyou.
LITERALLY the best DC motor explainer video ever
Perfectly made..... This demonstration is incredible. More easier to understand.
I agree
My Physics Teacher tried explaining this and I understood nothing. I watch this video and my brain goes BOOM in understanding
The Skirata even Edison had trouble explaining.’if they had this video back then they probably wouldn’t have used the electric chair to demonstrate
I couldn’t agree more. Spectacular
Am 50 years old and must say that if such videos had been available in my school/college days then I would definitely have been a " Brilliant " student !
A big thank you to the author !
Being a little older I had difficulty with math in school so I could never be an engineer but I still want to know more about electronics, thanks
But along with this benefit of technology there are some problems and distractions are also in this digital world.JAY SHREE RAM 🚩🚩🚩🚩🚩🚩🚩🚩🚩🚩🚩🚩🚩🚩🚩🚩🚩🚩
This encapsulates the " it's better to SEE it one time than HEAR/READ it thousand times" saying perfectly
Absolutely brilliant explanation. It is wonderful in its progression of smaller explanations until it arrives at the final stage. The viewer understands every step along the way, so they understand the whole concept. Just excellent. Thank you so much.
Goodness, it’s sad, as a 45 year old man (and IT professional), how much of this was new to me (about 95%). This was great and very informative!
@Joshua Bray, that makes two of us. If it helps I’m 51 and and IT professional. 😐
it's never too late to learn sir.
I consider myself lucky watching this as student
sorry to inform you that you are still very behind. This explained brushed motors.. something that has been outdated in all but the most simple devices for years. Even most RC cars/Toys use brushless.
@@crisnmaryfam7344 what are they using now?
Can we just take a moment to appreciate that this guy spends months researching and creating these animations just for us and explains it simply in only 10 mins
Thanks Mustafa - I really appreciate your kind words!
@@JaredOwen I got an idea how about you explain parts of the human body in 3d
@@SLYFOX-17 but that's biology..
@@SLYFOX-17 he does physics videos
@@alchemist6819 he can explain anything he wants in science
This is one of the most enlightening videos, ive every seen. One of the best lessons ive ever seen in my life! How succinct and elegant an explanation!!
If you’ve never used an air filter these are great. th-cam.com/users/postUgkx_dppjvjF8BYEmPSDTcgCUdRsgWYLXNHN I ended up with three after starting out with one. The noise level depends on the 1-3 settings with how hard you want the machine to work. You can also upgrade the filters and get one better for pet hair and smells which is a must have in my home. I noticed the air seemed lighter and easier to breathe when running the machine for the first time. Works great every time. Highly recommended!
I graduated in electrical engineering. I've seen your lectures, major books, TH-cam videos, but I've never seen a video that explains it so well. This is a perfect explanation. I wish I had seen you earlier.
👍👍❤
I'd like to just give huge respect to the guy who did the animation, I've been confused by electric motors for years, not any more!
Also good to see a DC Motor in real world: th-cam.com/video/XSJGQf82sg8/w-d-xo.html 👈
Masterclass explanation with relevant animations. I have my GCSE physics exam in about 15 more days, and this video has single-handedly increased my confidence level. Wondering why teachers aren't using this video for explanation. Watched it over like 10 times in awe from the age of 13, simply extraordinary! Thanks!
I have my gcse on 6th
@@sundayisfunday1354 All the best, I have mine on 16
@@pranavm5201 Good luck to you too!
Hello, How excellent explanation is , you are very special.
God bless you more
Thanks
This is the best video I've ever seen explaining commutation. I'm sure you would do an amazing job with AC. Either a synchronous or induction (squirrel-cage) motor breakdown would be awesome.
The moment when you realise, this animator guy teaches much better than your science teacher.
Why didn’t I see this 14 years ago
My physics teacher is actually the shittest teacher ever, and this boy cleared all my confushion.
Show your teacher this video.. And teach him how to teach
@@leocarlton4364 i think it is a trend among physics teachers to be the shittiest teachers ever
@@anth0r but i did
Imagining the “eureka moment” when these concepts were first discovered.
U are right bestest teaching and animation ever
eureka moments can't possibly make the thinker any happier, its one of the best feelings
8:59
hundreds of thousands of experiments conducted before we have these techs
Brilliant engineering
Bro your explanation is 1000x better & simple than any professional lecturerAt
04 years og engineering and 10+ years of experience, I haven't came through any such brilliant understanding of motor working. Thank you very much
R. I. P. School education when this person's videos are available for free!
Great work!
Yᴇᴀʜ !
He also went to same school system
Education system is fine it just that poor people dont get much educational facilities like labs and animated explanations in classrooms
@@SingleAsSun hi
@@os9458 hi
This video made me understand how magnets work more than my teacher
Me too🤗
Same, but with electricity too.
He explains a lot of things better than the teacher
Bro sameeeeee
Same bois
This is the best explanation I have ever seen of a DC motor. The part with the magnet changing inside the loop is the big difference. Brilliant explanation
This is the best educational video on youtube hands down!!!!.....I can't thank you enough man. Respect!
I am amazed of how simple this is, school made it complicated
I'm still confused
You're so right!
school makes it complicated by using math formulas, rather than teach us how it works
@@kakyoindonut3213 You misunderstand: like it or not, math is the entire reason it works. A class that teaches how a motor like this works is going to need to include the math for people who are going to go on to become engineers or physicists: people who will not only need to know the basics of how these work, but _exactly_ how they work, so they can make improvements or design their own.
@@Tantalus010 "class that teaches how a motor like this works is going to need to include the math for people who are going to go on to become engineers or physicists"
you're wrong, me and my classmates never learn the math to become an engineer, but rather to pass the exam.
you can't build a lego stuff if the instruction are made using math, you can build the lego stuff if the instruction has an image in it
We studied this in college for 3 years and forget everything.
We learned this in 10 minutes and it remains in mind forever. WOW
Right bro🤝
College, lolz, i am in year 9 and ik this
@@theaslam9758 you 9th class or 9 years old?
SHASHI KUMAR If u were in the uk u would know that i am 14
@@theaslam9758 I m not from UK though. But I agree to u because Now I realise that I had this topic covered in 9th. No offense...
Absolutely stunned by the clarity in your teaching 😊
Everytime i need a refresher about how this works, I always come back to this video. completely refreshes my memory, the explanation is too perfect.
This is one of the best videos explaining the working principle and construction of an electric motor i have ever seen. I am a Physics teacher and I use this video in my classes because it is perfectly animated and the didactics are just right. Thank you!
Hi
th-cam.com/video/YIJMf8hPsYg/w-d-xo.html
Indeed
But i think it actually have a miss when presenting an electromagnet in armature. It should be a current, only electric current brought by the wire interract with the magnetic field perpendicularly. And not the electromagnet created by the armature.
I'm not a technical guy but this video explains quite well except, I thought some more animation or explanation was required for me when you were explaining an increased number of windings required. Thank you!
Imagine getting this type of quality on education mainly on school. Not only will this help the student makes them want to learn stuff but it also prevents them from getting bored from lectures. As always, not only your content is very educational but also a high quality video. Keep up the good work!
For sure. Very good comment.
.
Yeah, its hard to learn if they make you take note while listening. Its hard to focus on 2 things
Right on
@@SoloLevellor As a former professor, I can say with 100% that you are more right than you know. By the time a teacher really understands what the hell they are talking about, they are being pushed out the door.
One of the best explanations ive ever seen about a motor. Kudos. Keep educate us with these type of brilliant animation videos!!!
Dad: My son will become an animator
Mom: My son will become a physicist
Son:
wanna become youtuber and earn like mr.beast
Son: both. both is good
@@shalomyt8516 lol ya
more like electrical animation engineer :D sounds neeter!
@Dev Naik bro who doesn't have dream to not become Mr beast
Thank you for this kind of quality content. You deserve more than this...
You learn this at school not at electrical engineering . This is the fundamental to start learning your EEE 😂😂
LOL
@@vardhansiravuri kkmmmmmmkkkkkkkkmmm
@@vardhansiravuri In our country Myanmar (Burma), we are barely taught this kind of subject. All we had to do is memorizing the whole textbook without understanding a word. Education is completely messed up by 60 yrs of dictatorship and the world longest civil war. The education system was so corrupted, only the rich and elite people can afford education. ( Yes, we are unpopular north koera of ASEAN ).
btw not even engineering student but guess what ................................................................. Medical students also, so imagine our healthcare system. :P
@@exoexo872Oh Damn !!
Sad to hear that 🙁. Then why you people don't choose studing abroad for atleast better education ?
Excellent excellent. I love videos that build up from simple to progressively more complex step by step towards the final solution with good descriptions along the way. 👍
What an elegant illustration of concepts! Thank You.
I learnt more in this 10 minutes video than my whole 4 years of engineering!
Glad to help😀
Jared Owen AAAAA HE REPLIED
which stupid college did you go to lol
👏👏👏
That's true!!! Thanks Jared !!
Do “How does a refrigerator work” next.
I think it works by stretching rubber bands and then compressing them, over and over. Jk. But someone has made that before
yes please
No. He said that he will make a space shuttle animation.
@@limesheep0140 No, it works with a bicycle air pump and an aerosol can. Just ask curiosityshow
@@majortom4543 ok then but refrigerator animation would be nice
I had watched this previously also,
But, This time it made more sense a night before the Exam.
BTW, the electromagmet polarity change illustration was just amazing...
It made the concept extremely lucid to understand
I’ve taken two college level electronics/mechatronics courses and it’s never made this much sense. My systems professor made us watch this, thank you!
This was such an comprehensive explanation of structure and working of an DC motor; beautiful. The way you explained the concepts in a simple yet effective manner was wonderful. I loved the way you took it from the scratch and then went up with marvellous explanation through clear and intelligible animation.
If I were a teacher, I would have shown this in my school to students. Complete understanding, no doubts, great visualisation, just an amazing way to learn.
PS: It's been a long time coming from this channel. But worth the wait.
Thank you for your kind words😁
@@JaredOwen Do a "what's inside the Washington Monument" In the future
@@mohammadabuelhawajordanian1765 or a Brushless motor
great
👍
I am speechless... Super awesome..!
PowerUP with POWERPOINT What is your address?
@@mehrojsharofiddinov276 : Means..?
You also are youtuber!!! 😱😱
Qpqweeurugyy.xgh g s
Not speechless
The explanation was literally perfect
THANK YOU!!!! Im going to schook for hvac and reading my book was BORING 🤣😭 and it made it difficult to put everything together. You just connected so many things for thank you!!!
I've learned more in this 10 minutes video than in my 10th grade science class.
same here
True
Same 😇
True😂
My teacher actually recommended this video to us so that we can learn better in this lockdown.
This is my most favourite technical presentation even better than my well paid engineering professors. Watched and shared countless number of times.
Thank you for your valuable time, I was struggling how to explain how the motor works in my assignment, cheers❤
Thank you I love how you work your way up to the complicated staff
this was the most easy to understand animation on the basics of a motors i HAVE EVER SEEN!.
Same
Great Scott has some prettty nice ‘basics’ on electronics. Easy to understand for how complex they really are. I recommend his channel
Nothing is better then education by animation.
Well said my pal
Sketch, drawing, picture, video, it is a speech of engineers.
th-cam.com/video/vyCHzit56Ho/w-d-xo.html Teaching winding motors and maintenance with all the steps I hope to subscribe to the channel if you like the video
@@frustadi6645 th-cam.com/video/vyCHzit56Ho/w-d-xo.html Teaching winding motors and maintenance with all the steps I hope to subscribe to the channel if you like the video
@@SYN-flood th-cam.com/video/vyCHzit56Ho/w-d-xo.html Teaching winding motors and maintenance with all the steps I hope to subscribe to the channel if you like the video
This was very eye opening video about DC motors, and commutator in specific..... I've been long time wondering how it works,...Thank you!
Excellent, extremely brilliant presentation. Whatever questions I had in my mind all are gone. Nice way of defining the function of rotation. Keep it up. Bring some more.
in my opinion your next video should be on "how touch screen works "
and this video is amazing
There is an electro magnetic field that is above the screen, then the cpu calculates where on the phone your finger completed the circuit with it (in case you don't know, your body conducts energy so it can complete the circuit)
Chernobog that’s too complicated to understand in words we need a video
@@The_zenithgod yes u r right
@@chernobog8948 indeed ur explanation good but we will satisfied after a video by Jared oeen
@@atharvar7787 th-cam.com/video/cFvh7qM6LdA/w-d-xo.html here is the video
I've been sitting next to my textbook trying to understand this concept for 3 days. You managed to explain it to me in 10 minutes. Keep up the amazing work.
Love you
your way of explaining the switching polarity and magnet movement was awesome.
I'm a person who understands more when the topic is visualized or animated so this video really helped! Thank you! ❤
I'm hooked. The explanations and visuals started with the basics and gradually added complexity. It made understanding the concepts fun.
I'm surprised to see a woman on an electrical engineering video or any engineering video for that matter
@@deeznuts-pf2lv iivok
m
@@deeznuts-pf2lv *a r e. y o u. a. g e n d e r. r a c i s t ?*
@@evan.z974 women don't do engineering much, it's a fact
Imagine, there was a time, where someone find this out. Mindblowing
Several times, really. Machines like these are an iterative process, so someone builds the first one, then others improve it over time.
That will be the creator of the DC motor and AC motor
i was in my 9th grade when i first saw the video to better understand motors , now i keep coming back once in a while to enjoy this masterpiece of an animation..
This is the best presentation of this concept I've ever seen. Absolutely amazing.
I am an electrician who really struggled with this concept early on in theory, easily explained in 10 minutes.
Thank you.
Glad to help Connor
Mee too..very well explained details
im in the process of becoming a marine electrician. any material or suggestions you'd be will to share?
it's absolutely fake because electricity is a type of magical power so it's not real and sadly there is Nothing called electricity in real life also electricity can't do things by it self so it's a real magic
10minutes 3seconds 😁😁
This is how lessons are supposed to be in the future, animatic, so we can easily understand and memorize
The is the only time I’ve felt smart while watching an educational video.
Some teachers make things like this really confusing, this is great and answers most if not all questions with a great and easy understanding video
its my first time enjoying a lesson on anything that has to do with magnets. Thank you.
Because of video story
Whoever invented this motor was really a big brain
Whoever it is...That guy take "what if...." to the next level
When you realize what more Nikola Tesla invented your head will blow off lol
It didn't really take a genius to invent the electric motor. Once scientists had clearly specified the electrical properties of materials and their circuits, it was like playing with a Lego for the inventors. Suddenly, the world was full of electrical inventions, which were all created in a few years at the end of the 19th century. Genius we can call James Maxwell who described with equations the electromagnetic field, the first unification of physics.
The most difficult thing is to understand the laws of reality. Reality does not come with a manual.
BIG BRAIN MOVES
It’s mostly about experience...
Just perfect breakdown,from simple to complex. Awesome.
Thankyou for explaining this concept, its answered my question for along time, now i can imagine how it works.
I've watched several "how" videos about motors, but this was the best one, thanks!
Thanks Jason
Give this guy a Nobel prize for explaining this concept soo easily.
Its been 13 years since my graduation i came to understand the concept that too in the most effective way. Thank you man!
Incrível vídeo! Fiquei alguns segundos sem entender porque um vídeo com título em inglês tinha um áudio em português. É a primeira vez que vejo um vídeo de áudio mutável!! Incrível, parabéns pela didática, perfeita explanação!!
This is totally the BEST video explaining something. Quick, brief, and to the point! Anything that needed to be said WAS said, and in reasonable time as well. Very clear and concise.
Thank you Falkor!
As an Indian , I agree this type of learning will make a huge change in the Future. Love from India ❤️
Alakh Pandey sir is also changing the education !!!
yes
You should learn to stop pooping in the street
@@conradmcdougall3629 *on.
You should learn English.
@@conradmcdougall3629 well it's not your Street
This is the best explanation of a DC Motor that I have ever seen. Brilliantly done.
You are excellent and best ever lecture on dc motor. im a engineer student but still i used to learn this in bookish language. But now i got what it is actually.
Holy smokes! I can’t believe I learned so much in less than 10 minutes and it still sticks in my head 🧠🤯
Even for me too dude
Perfect explanation. I got a Master degree in Engineering, but this is first time i really understand how a electric motor works!
XD
Go for your school fee Refund
Holyshit
Dude if you studied something even remotely related to mechanical/electric/automation engineering you got scammed. This is explained really well and the creator did a wonderful job, but it covers the most basic part without any demonstration/formulas. You should be doing much more than this!
I've been watching videos to try and understand transmission of electricity for almost 6 hours and I was still quite confused. This video made so much sense to me and I honestly can't explain how. Thank you so much and God bless you! Can you please do a video on transmission of electricity (like alternating current and emf.) It would mean the world to me!
Just watched this with my 6 year old son, as soon as it was done he already had so many ideas. Thank you! Amazing video!
He is just too good. A natural teacher. Let alone the animation skills.
this is sooo better than a 1 hour tutorial of a physics teacher tesching
with white board
True
@sussy impostor The thing with the electromagnets is that their north and south poles can switch place depending on the direction of the current/electricity. A permanent magnet can't so since the poles will stay the same the magnet will just align with the permanent magnets around it and stay still.
the way u describes things is amazing
I spent like ten mins looking for just your video.
It’s so well done, and I’m so glad I learned from it
This is the first time I've heard "reverse the polarity" outside of Star Trek.
🤣😂
...Or Doctor Who
@@scheldon2244 true!
😁
i’m really amazed. the fact that i was able to understand this shows how good you guys are at illustrating and explaining. if only teachers were as good as you! thank you much!
Teachers have to deal with all the class clowns and can’t actually teach. If you want to learn pay a private tutor.
Then what do they get paid for?@@steftrando
@@Olderaccount17 to babysit other people’s kids basically
bruh y'all CAN PRAISE THE VIDEO WITHOUT SLANDERING YOUR TEACHERS sheesh. Not everyone has the talent for animations, and teaching a class is more than just explaining stuff.
@@TheModeler99 I’m just saying this is better than what most teachers do lol, I’m not slandering what them, there’s a difference so please watch your words.
9:00 o boy, many lightbulbs did. i'd never thought i'd come to jared owen for education, but i have a test tomorrow and i did not understand anything about dc motors and this video is just... wow. incredible. really sending my thanks, you a life saver man
This is the best explanation I have seen of exactly what the commutator and brushes are actually doing.
After 4 years of electrical engineering, this feels more enriching 😄
Hello Ashutosh jha
I am also an electrical engineer
Where r u from?
Haha sai bat 🤣
@@kaleemashraf1263 he is from india.
Hi
This is called reverse engineering, and what we're learning is a device that covers so many grounds of scientific understanding. We begin to learn those grounds of reality as well thus increasing our understanding of the universe as well as the device.