3 Ohm's law & Variation in Resistance | Current Electricity Class 12 | JEE Mains & Advanced
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- čas přidán 13. 07. 2024
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Topics covered in this Current Electricity Class 12 lecture by ABJ sir IITD with timestamp:
00:00 - 00:40 Recap of the last lecture.
00:40 - 07:00 Current Electricity Problem 1: Based on the relation of the electric field, current density, and resistivity. In this problem, we have a wire made with two metals, Al and Cu. We have to find a charge at the interface. As the Electric field in both metals will be different, so we can find net flux in the form of current and resistivity. Using Gauss law, we can find the charge value on the interface.
07:00 - 11:52 Current Electricity Problem 2: Based on the relation of the Resistance & resistivity. In this problem, we have a Cuboid of dimension l x b x h, and the resistivity of the cuboid is given. We have to find the value of the resistance of this cuboid. Knowing the current direction to decide the area is important to determine the value of resistance.
12:02 - 15:04 Current Electricity Problem 3: In this problem, we have a Cylinder of radius R2 with a cylindrical cavity of radius R1. The resistivity of the metal is given. We must find the metal's resistance according to the current's direction.
15:38 - 25:09 Current Electricity Problem 4: Based on the relation of the Resistance & Resistivity, when area is variable. In this problem, we have a two concentric conducting spheres of Radius R1 & R2, and Potential V1 & V2 respectively. Resistivity is given for this arrangement. We have to find the resistance of the medium.
25:39 - 39:11 Current Electricity Problem 5: Based on the relation of the Resistance & Resistivity, when area is variable. According to the given arrangement, Radius of one surface is R1 and another surface is R2, and resistivity is given. Direction of current is from 1 to 2. We have to find the value of resistance.
39:44 - 45:20 Current Electricity Problem 6: Based on the relation of the Resistance & Resistivity, when resistivity is variable. According to the given arrangement, the cross-sectional area is A, and the length of the conductor is L. Direction of the current is from 1 to 2. We have to find the value of resistance.
45:45 - 53:55 Ohm's law and examples: Ohm’s law states that the voltage across a conductor is directly proportional to the current flowing through it, provided all physical conditions and temperatures remain constant. According to Ohm's law: V = IR. The direction of the current is from higher potential to lower potential. ABJ sir also gave some examples for concept clarity.
54:05 - 01:00:16 Dependency of resistance on the length and cross-sectional area: The relationship b/w length, area, and resistivity is already explained earlier and we solved some problems with it. In this topic, ABJ Sir explains the variation in resistance wrt change in the area and length of the conductor.
01:00:26 - 01:03:23 Current Electricity Problem 7: Based on Ohm's law and variation wrt to area and length of the conductor. In this problem, A wire is stretched to increase its length by 10%. Find % change in Resistance.
01:03:26 - 01:09:31 Current Electricity Problem 8: Based on Ohm's law and variation wrt to area and length of the conductor. In this problem, A wire is stretched to increase its length by 1%. Find % change in Resistance.
01:09:55 - 01:15:39 Dependency of resistance on the Temperature: Variation in the resistance wrt to change in temperature is explained by ABJ Sir. Relation b/w temperature and resistance is also derived with explanation.
01:15:56 - 01:17:58 Current Electricity Problem 9: Based on Ohm's law and variation wrt to temperature of the conductor. In this problem, resistance at 0 degree C is given and we have to find resistance of the same conductor at 20 degree C.
01:17:58 Current Electricity Problem 10: Based on Ohm's law and variation wrt to temperature of the conductor. In this problem, resistance at 0 degree C is given and we have to find resistance of the same conductor at 100 degree C.
This is the Third lecture of Current Electricity class 12 for JEE Mains & Advanced. There are 14 lectures in one shot for Current Electricity class 12, in which ABJ sir covers all topics, concepts, examples, and problems important for JEE Mains and Advanced.
This Current Electricity Class 12 Physics lecture consists Problems on the resistance, resistivity and ohm's law. This lecture is for the Science student of class 12 who is preparing for JEE Mains & Advanced or Olympiad. ABJ sir also covered JEE ADVANCED PYQ in this lecture.
Prerequisite of the chapter: Electrostatics Class 12
Playlist of Electrostatics Class 12 -
• Electrostatics Class 1...
AMIT SIR please 11th MECHANICS finish kar dijiye ASAP. I am 2021 aspirant and not much time left. THANK YOU so much sir
Thanks a lot sir. You are doing so much for us selflessly and providing the best content upto jee advance and olympiad level. No one before u provided the exact content of jee advance level before u. All teach max upto mains level only. But ur content is of olympiad level. The type of advance illustration u do is fantastic. It clear all my concepts and make me to think that how can I approach a particular problem. So thank u very much sir. I hope ur blessings will live with us forever.
Jai Shree Shyam
Jai shree ram❤❤@@MohitSharma-yv7we
Sir the work you are doing for us! Is Amazing..
we can't thank you for your this much hardwork of daily uploading videos consistently! 👌🤗
Even idk why these type of channels doesnot have subscribers in millions!😏
But will assure you that will hit million one day! 😊😀
Areh aesa mtt bolo yrr ,agr yeh channel sbhko pta chlne lga toh 😐,bohot competition bdh jayega 🤦🏻yrr ,
@@drme989 bilkul bhai , khajana chuppkee rkhoo
They are close now, 850k subs
Its 15th Nov 2023, yes they are really close now. The subscription count has reached 930k. 70k left for 1M.
@@avinashkashyapjha2247 its 1.2M now
ITNE RUPEE KE ITNE AAM TO KITNE RUPEE KE KITNE AAM----ABJ SIR [2020 probably]
Sir, ek teacher ne bola tha ki class me jo samjh me nhi aata JEE Wahi se questions poochta hai but aapki class me to 100% samjh aata hai to jee kahan se poochega 😂😂
Kon sa iit mila
Out of syllabus !
Iit kharagpur
Sahi baat hai 😂😂
Iit clear hua?
0:05 7:50 12:05 15:40 25:35 39:30 48:35 1:00:30 1:03:30 1:15:55 1:18:00
this is where class 10th's current electricity ended and here we are...NOstalgic
First comment from Allenite💘
I like your teaching style your teaching style just like peace and this is pretty 😍😍😍😍 amazing
I am totally depend your physics lecture👌👌👌👌
Khatarnak padate ho sir
Mazza hi aa gya
God of concept love you sir never seen a teacher like you 😍😍😍😍😍😍🎉🎉🎉
39:00 I've come across this type of question in elasticity... (This figure) i wasn't able to solve it correctly by taking elemental ring..
But today you solved🎉❤
Thank you so much sir 😊❤
Integration and taking elements in physics is a tough task
@@Hardworkerpatshala123 BROTHER I AM ABLE TO TAKE THE ELEMENTS CORRECTLY WITH THE LENGTH MEASUREMENTS BUT CANT DO THE INTEGRATION
and that question is asked in adv 2022
@@TheUnpluggedPerson NEET asp or std 11th? make basic maths strong and do some basic questions of int
Sir please complete syllabus before January attempt I request you on behalf of me and other students as well
Today this channel reached at 300k love you Competishun 💕💕😍😍😍
i want to say something guys in am vibrant dimound batch and content is same or better plz utilize this properly thanks sir for providind these great lecture
Thank you sir for making it so eassy ❤️
sir its a request please aap jee ke pyq bhi video mei add kar dijiye isse confidence aata hai please
and sir maine current elctricity pahele se hi padha liya hai to kya mujhe ye lect. dekhna chahiye please reply
No
. questions lagao.. don't waste time 👍
Noo, woh khud karne chahiye
Sir could you please tell how to find equivalent resistivity of a system of wires because same question was asked in JEE main March attempt.
aaj mene notice kiya sir to ajinkya rahane jaisi hi dikhte hai
ha bus thoda se healthy hai sir ka face baaki to bilkul match karte hai aanjikya rahane se
Thank a ton sir for providing really quality content first time on CZcams in sequence order
I was just feeling sleepy and there was no mood of study..but after i came here sleep went away.... Thank You sir for solving my every problem ❤
Sir awesome 👍👍
Thank you sir aapke karan mera physics badhiya hua
Happy Guru Purnima sir🙏❤
Thankyou-Sir❤️
Thanku very much sir.....
Sir i was thinking that we have many chapters remaining in physics ,, will it covered by january or not. ,,if not then sir plz tell how many months will it take🤔
Sir plz make a video on kvpy prep for sx
Thank you so much sir
The you very much sir for video of 1.5 hrs......upload videos of same length only....once again thank you 🙏🙏
Plz Sir can you tell how many lectures are there in current electricity
Thanks sir 🙏😊
Thanku sir..
Please complete electricity and capacitor as much as possible sir 🙏🙏🙏🙏🙏
Ans soon start magnetism sir..
Sir, at 6:11 ham charge ko +ve maan kar chala tha na, jo electric field+ve se _ve chaltha hai. E2 tho sahi laga but E 1 is terminated at +ve charge. Please explain sir 🙏.
Thank you sir🙏💕🙏💕💕
thank you sir 001
Luv ❤❤❤❤ u abj sir
Thank you sir
Thank u sir
Sir pls upload videos regularly
Sir agar body diagonals ke along resistance nikalna hota to kese nikalte?
Sir first question irodov ka tha na ?
Sir kya mai board exam ka liya app ka video follow kar sakta hu.
No Amit ,,board level would be much easier than this level so you should not watch these lectures if u r not preparing for jee
Sir.. Sheets kahna milti hai apki..plz reply anyone????😕
Sir next lecture kb ayega
Where to find sheet please tell me
ye class 11 ke liye hai ya class 12 ke liye.. sir aap video ke title mein likte ho na... aaj kyu nhi likha
Sir lecture k playlist bana dijye please
38:47 my answer is coming rho l^2 /((pi(R2-R1) R1R2))
thank you sir understood and enjoyed concepts :)
Excellent
@@MohitTyagi 1:03:03 sir here I have done with error method I got 20 % .. y am I wrong pls say me sir ❤
@@MohitTyagi sir pls clear my doubt
Where are the dpp posted??
Sir app work nahi kr rhi h mobile me , usb bugging aur developer acces maang rhi h , iski koi solution?
Sir mujhse cengage solve nhi hoti mai class 11th mai hu what should I do
despite being very good quality lecture it's just 3months and i am lossing my flow and i know its my last chance. i will came back on track as soon as i could.
R u back on track?
@@vishalsinghal6664 no
sir moving charge ke liye potential ka meaning kya h??? means ki ham electrostatics me to potential ko kehte the ki charge ko electric field me infinity se laane me jo work done karna pad rha h use kehte the lekin yha to charge motion m h
Potential difference is referred as potential here
at starting i am losing flow but your teaching quality is top-notch now at end i back on track again,
You could say abj sir provided an electric field
@@kashyaptandel5212closed loop mai nahi tha shayad isiliye velocity 0 hogaya
Sir please upload 2-3 video lectures daily 🙏🙏🙏🙏🙏
Yes. Atleast 2 lectures per day
Started
Next vedio when uploaded.
Sir 1st que is like joining two resistors in series, right sir??
if so then according to kirchoff's first law charge entering a point must be equal to charge leaving na sir
then how can charge be accumilated
i know this video is an year old
but anyone plz reply
Bhai answer pata chala kya plzz reply
Sir
Sir If I scored 68 marks in science and 86 marks in maths in class 10 then am I eligible for kvpy sx exam?
Also do class 11 marks required for kvpy sx exam?
Please reply sir as soon as possible
No class 10 and class 11 marks are not required for KVPY. Any student with science stream can give KVPY in class 11 & 12
how we can integrate dr as it is constant
as resistance is constant for given material
Resistance is constant for a given material but it varies with length and area of cross section of conductor. dr is the resistance for a small length (dx)
Sir apane jo temperature dependence of resistance sikaya yadi usme alpha.deltaT ki value 0.5 aye to kya krae and please tell 2006 aieee question on temperature dependence of resistance
Please any one tell me
@@pawanbairwa5934 ok
started 21.26
Sir one thing I wanted to ask is that the the batches which are taught by competishun team gets extra supplementary materials otherwise the content team is putting on the youtube is same???
And are they all upto jee advanced level??? I mean in all subjects be it organic chemistry as well
Pls sir pls reply to the doubt
As per sir promise lectures r same . but there u get sheets,dpps,tests,sheet&dpp sol as well as video solution.
Also doubt clearing facility.
Content is same. Students enrolled in competishun get doubt support and study material dpp and their video solutions. After every 21 days we have to give test 2 tests of mains level and then one of advanced level. Hope that answers your query
Yes bhai sb same hi h kuch alag nhi h
Is ∆T change in temperature or new temperature???
change in temperature
32:47 why didn't sir write pi in denominator?
π is constant
To fir usko integration ke time bhaar nikal lia ¶ ki tarah hi
Aur sir usko 32:47 wale step m likhna bhool gye
But last m sahi kia unhone
i found yt hannel when our 12th is ending jee main is on head full baklogs i dont know about this hannel i will definately leared jee mains and advaned and i will suggest to my juniors about this hannel when i will giving interview ..i wished i know yt hannel wehn our 11th is starting then i did not purhase pw subsripation...😔😔(my see button is not working thatswhy see is mssing there)
AMIT SIR, PLLS listen🙏🙏🙏
sir , jo aap exercise 1, 2, etc., ki baat krte ho kya vo aap competishun ke batch students ke liye khto ho..
yaa aapka koi telegram channel bhi hai jhn aap exercise send krte ho..?
Bhai pata chala kaha se hai?
osm
Well satisfied with ur videos sir tq
Keep watching
@@MohitTyagi k sir 😁
Guru Ji
sir wire ko stretch krne pr youngs modulus ka farq nai ayega ?
same question. i guess assumption ye hai for q solving purposes, ki volume same rehti hai.
From where we can get section -a questions?? Telegram or app??
Bhai pata chala?
why is there an ad every 2mins
Sir 🤟🤟🤟🤟🤟
Can anyone explain at 33:56 , sir wrote R2-R1/l ×dx = dt , where is R1 which was added above ??
Sister, R1 is constant....so after derivating both side R1 become 0.....simple, basics math
BRO VAISE TO JAB MATHS ME INTEGRATION PADHOGE SEEKH JAOGE LEKIN VO BOTH SIDE DIFFERENTIATE KARNE KE KARAN CONSTANT TERM ZERO HO GYA NA
@@susovanghosh3535 just slipped out of my mind , thank you so much
Same yrr@@saniyasharma4377
Sir please complete the syllabus of class 12 first and at a good frequency....
Secret superstar......❤❤❤❤🔥🔥🔥🔥🔥
Is Competishun's sheet same as that of resonance? plz answer if you know
Yes it's mostly the same
Yes..they are same
Where to find resonance sheet..?
Bhaiyo sir jo sheets se homework dete hai wo sheet kaha milegi??? Plzz tell
Telegram
Sir sequence of chapter
1:00:00
Sir DPP problem discription me link de dijiye
Bhai if you know toh mujhe bhi batao where is the dpp
r=rho(r2-r1)x/a
Where is the sheet available for questions practicing I can't find it
Wo paid batches walo ke lie hai
1:00:11
Sir Which should I choose Physics galaxy or reso sheets
Vishal Kumar Reso sheet
1:00:10
1:03:25
39:00 soo tough
ohm law 45:00
Sir in the first question why does charge accumulate at the interface?
If the resistivity is different then charge will not flow uniformly ... so it will get accumulated at the interface
@@pushing_the_limits yo why is there the same charge flowing through both wires? Doesn't charge also depend upon the Resistivity
Sir audio is low
Whgxotzotzotzotyzlgxj pm ztxyodo 4th syosydufugogd yyuhfzogsypdiffuf
Sir electrostatics and conductors khtm hogya?
Yes
Hello
yeh disc kaise bani samjh me nahi aaya - shouldnt it be a ring-30:05
The cylinder is not hollow, it is a solid cylinder made up of infinite discs.
Ring is kind of a hollow material but disc is Solid As we calculate Rho instead of Sigma in Disc
where can I get sheet
Sheet 2 sal phle ki h inke app pr hongi vo sirf paid subscription wlo ko mili thi