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Lesson Posted on 08 Feb Exam Coaching/NEET-UG Coaching Exam Coaching/Engineering Entrance Coaching/IIT JEE Coaching/IIT JEE Advanced Coaching Exam Coaching/Engineering Entrance Coaching/IIT JEE Coaching/IIT JEE Crash Course

Work Energy Theorem

Saurabh

I teach physics and chemistry for NEET and IIT-JEE entrance exam. I am having teaching experience of...

Work done by an external non-conservative force is equal to change in the mechanical energy of the system.Final M. E - Initial M. E = WIf an external force does no work, then mechanical energy will be conserved.(1) If no external force is acting on the system, then the system's momentum and mechanical... read more

Work done by an external non-conservative force is equal to change in the mechanical energy of the system.
Final M. E - Initial M. E = W
If an external force does no work, then mechanical energy will be conserved.
(1) If no external force is acting on the system, then the system's momentum and mechanical energy will be conserved.
(2) If an external force is acting on the system, then :
(a) if work done by an external force is non 0 then both M. E and momentum will change.
(b) if work done by an external force is 0, then M. E will remain same I. e mechanical energy will be conserved, but momentum will change as an external force is acting on the system.

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Lesson Posted on 08 Feb Exam Coaching/NEET-UG Coaching Exam Coaching/Engineering Entrance Coaching/IIT JEE Coaching/IIT JEE Advanced Coaching Exam Coaching/Engineering Entrance Coaching/IIT JEE Coaching/IIT JEE Crash Course

Friction

Saurabh

I teach physics and chemistry for NEET and IIT-JEE entrance exam. I am having teaching experience of...

Key points: Friction does not oppose the motion, but it opposes relative movement between the contact surfaces. When there is no relative motion between the contact surfaces, then no friction force will act. Still, if there is no relative motion between the contact surfaces, but there is a tendency... read more

Key points:

  1. Friction does not oppose the motion, but it opposes relative movement between the contact surfaces.
  2. When there is no relative motion between the contact surfaces, then no friction force will act. Still, if there is no relative motion between the contact surfaces, but there is a tendency to be in relative motion, static friction will work. 
  3. Static friction is self-adjusting in nature.
  4. Static friction has a maximum limit, and that maximum friction is called as limiting friction.
  5. When there is relative motion between the contact surfaces, then kinetic or dynamic friction will act. 
  6. Kinetic friction is constant in magnitude.
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Lesson Posted on 28/12/2020 Exam Coaching/Engineering Entrance Coaching/IIT JEE Coaching/IIT JEE Advanced Coaching Exam Coaching/Engineering Entrance Coaching/IIT JEE Coaching Exam Coaching/Engineering Entrance Coaching/IIT JEE Coaching/IIT JEE Crash Course +3 Exam Coaching/Engineering Entrance Coaching/IIT JEE Coaching/IIT JEE Integrated Coaching Exam Coaching/Engineering Entrance Coaching/IIT JEE Coaching/IIT JEE Mains Coaching CBSE/Class 11/Science/Physics less

How to Prepare for IIT JEE Physics

Abhay

Hello Dear Students, In this article, we'll talk about a practical and achievable strategy to Score High Marks in IIT JEE PHYSICS.First of all, let me clear it; the number of books finished doesn't matter how many of them you can retain and are frequently revising. And, be aware that initially, you might... read more

Hello Dear Students, In this article, we'll talk about a practical and achievable strategy to Score High Marks in IIT JEE PHYSICS.
First of all, let me clear it; the number of books finished doesn't matter how many of them you can retain and are frequently revising. And, be aware that initially, you might think that you will complete and revise every popular book available in the market but, that's not possible. Sorry.
Start with basics, pick up any good book that has most of the topics related to the syllabus, and STICK to that. No Book can cover every type of subject and all variety of questions, and that's why your notes come into play.
For Basics Books I would suggest anyone book like B.M Sharma(Cengage)/Ashish Arora(Physics Galaxy), D.C Pandey or D.C Gupta or any other branch wise written books. I would recommend D.C Gupta because it is covering most of the topics and is priced very low (Spending more money doesn't guarantee a seat in IIT JEE, if you are excited to spend a lot I will request you to sponsor a child's education/books/study material. Their blessings might help you a bit)
And why notes? Because these are the things that are going to be your best book after the end of preparation. From your essential sourcebook, read a topic, and write it down in a precise(no copy-pasting) manner in your notes. Do not write down formulae only, instead try to note the steps involved in derivation because JEE understands matters. And, after that go through your Question Sets that could be from your coaching material, Tutor Marked Assignments(TMA), Test Series, or any other book like H.C.VERMA(HCV), Previous Year Questions(PYQ), Advanced Problems in Physics(Balaji Pub.), Arihant's Books, etc. While solving questions initially, you might be getting stuck in many of the problems. That's Completely normal, and the majority of students suffer from that, the point that you should note here is Improvement is a cyclic process. You can't improve yourself in one go.
Whenever there's a question that is bothering you, try to look for solutions and its concept. If you had studied that concept and noted it down in your notes, go there and highlight that you don't forget that next time, and if you haven't learned that concept, just note it down now and try to solve it again after a few days. When you are doing this, have faith in yourself. Every prodigy you see in your class/coaching/friend circle is 100% backed up by some EXTRA help; he might be taking coaching for coaching, he might be getting help from their IITian parents, Didi or Bhaiya. I could promise you that you would also achieve the same if you had equal access to resources. But, life is not equal and fair for everyone. All you can do is keep learning, improving, and sustaining the momentum. I repeat: do not go behind too many books.
Also, I have seen some students try to finish the same topic from multiple books for that extra safety, that's downright lethal!. Focus on 3-4 books, including NCERT and Exemplars and finish the book by the book. Like first go for your essential Source then NCERT then Exemplar and finally your Question Sets-PYQ-TMA. If there's a test approach, you can cover a single chapter from your 3-4 books. For example, if you finish Newton's Laws of Motion for a test from D.C Gupta then go for HCV then NCERT then Exemplar, and finally to PYQ and assume this chapter is finished now. If you keep adding sources, you can't tell your brain that you've finished that chapter and eventually you'll have low confidence. I hope you're getting my point.
Let me wrap it up, Stick to a few resources, keep writing and updating your notes. Have faith in yourself but don't be careless either. Don't try to build targets that require superhuman capabilities like I will finish NLM, Gravitation, Rotational, and WEP in one week. Sounds funny and stupid, right? But, I've seen those species also.
Finally, if you need help from me, I am always available offline/online and for any suggestions/questions, feel free to ask.
All the Best and luck doesn't matter. The probability of zero doesn't mean an impossible event.
Always,
Sunil Yadav

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Lesson Posted on 26/12/2020 Exam Coaching/Engineering Entrance Coaching/IIT JEE Coaching/IIT JEE Advanced Coaching Exam Coaching/Engineering Entrance Coaching/IIT JEE Coaching Exam Coaching/Engineering Entrance Coaching/IIT JEE Coaching/IIT JEE Crash Course +3 Exam Coaching/Engineering Entrance Coaching/IIT JEE Coaching/IIT JEE Integrated Coaching Exam Coaching/Engineering Entrance Coaching/IIT JEE Coaching/IIT JEE Mains Coaching CBSE/Class 11/Science/Physics less

How to prepare for IIT JEE Physics

Sunil Yadav

I started teaching in 2011 while pursuing a B.tech computer science course. Being hard-working and curious,...

Hello Dear Students, In this article, we'll talk about an effective and achievable strategy to Score High Marks in IIT JEE PHYSICS. First of all, let me clear it, the number of books finished doesn't matter what matters is how many of them you are able to retain and are revising frequently. And, be... read more

Hello Dear Students, In this article, we'll talk about an effective and achievable strategy to Score High Marks in IIT JEE PHYSICS.

First of all, let me clear it, the number of books finished doesn't matter what matters is how many of them you are able to retain and are revising frequently. And, be aware that initially, you might think that you will definitely finish and revise every popular book available in the market but, that's not possible. sorry.

Start with basics, pick up any good book which has the majority of the topics related to the syllabus, and STICK to that. No Book can cover every type of topic and all variety of questions and that's why your notes come into play.

For Basics Books I would suggest anyone book like B.M Sharma(Cengage)/Ashish Arora(Physics Galaxy), D.C Pandey or D.C Gupta or any other branch wise written books. Personally, I would recommend D.C Gupta because it is covering most of the topics and is priced very low (Spending more money doesn't guarantee a seat in IIT JEE, if you are really excited to spend a lot I would request you to sponsor a child's education/books/study material. Their blessings might help you a bit)

And, why notes? Because these are the things that are going to be your best book after the end of preparation. From your basic sourcebook, read a topic, and write it down in a precise(no copy-pasting) manner in your notes. Do not write down formulae only, rather try to note the steps involved in derivation because in JEE understanding matters.  And, after that go through your Question Sets that could be from your coaching material, Tutor Marked Assignments(TMA), Test Series, or any other book like H.C.VERMA(HCV), Previous Year Questions(PYQ), Advanced Problems in Physics(Balaji Pub.), Arihant's Books, etc. While solving questions initially you might be getting stuck in many of the questions. That's Completely normal and the majority of students suffer from that, the point that you should note here is Improvement is a cyclic process. You can't improve yourself in one go.

Whenever there's a question that is bothering you, try to look for solutions and its concept. If you had studied that concept and noted it down in your notes, go there and highlight that so that next time you don't forget, and if you haven't studied that concept just note it down now and try to solve it again after a few days. When you are doing this have faith in yourself. Every prodigy that you see in your class/coaching/friend circle is 100% backed up by some EXTRA help, he might be taking coaching for coaching, he might be getting help from their IITian parents, Didi or Bhaiya. I can promise you that if you had similar access to resources you would also achieve the same. But, life is not equal and fair for everyone. All you can do is keep learning, improving, and sustaining the momentum. I repeat do not go behind too many books. 

Also, I have seen some students try to finish the same topic from multiple books for that extra safety, that's completely lethal!. Focus on 3-4 books including NCERT and Exemplars and finish them book by book. Like first go for your basic Source then NCERT then Exemplar and finally your Question Sets-PYQ-TMA. If there's a test approaching then you can cover a single chapter from your 3-4 books. For example, if you finish Newton's Laws of Motion for a test from D.C Gupta then go for HCV then NCERT then Exemplar, and finally to PYQ and assume this chapter is finished now. If you keep on adding sources you can't tell your brain that you've finished that chapter and eventually you'll have low confidence. I hope you're getting my point.

Let me wrap it up, Stick to a few resources, keep writing and updating your notes. Have faith in yourself but don’t be careless either. Don’t try to build targets that require superhuman capabilities like I will finish NLM, Gravitation, Rotational, and WEP in one week. Sounds funny and stupid right? But, I’ve seen those species also. 

Finally, if you need help from me I am always available offline/online and for any suggestions/questions feel free to ask.

All the Best and luck doesn’t matter. The probability of zero doesn’t mean an impossible event.

Always,

Sunil Yadav

read less
Comments
Dislike Bookmark

Answered on 28/08/2020 Exam Coaching/Engineering Entrance Coaching/IIT JEE Coaching/IIT JEE Advanced Coaching

If there is a electric set up such that A and B are respectively positive and negative terminals of the... read more

If there is a electric set up such that A and B are respectively positive and negative terminals of the cell and a resistor PQ is inserted in the circuit. My question is how the current flows between A and P yet there is no Potential difference between A and P?

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Ankit Chauhan

Experienced Maths and Science Tutor

It is because when you insert a resistor, or when a conductor (resistors are conductors) is connected to a voltage source such as a battery, the negative terminal will present an opposing electrostatic force the conductor as well as have a ready supply of additional electrons. This field will repel electrons... read more

It is because when you insert a resistor, or when a conductor (resistors are conductors) is connected to a voltage source such as a battery, the negative terminal will present an opposing electrostatic force the conductor as well as have a ready supply of additional electrons. This field will repel electrons in the conductor and exert a force on them and will attempt to inject fresh electrons into the conductor. At the opposite end, where the conductor is connected to the positive terminal of the voltage source, a force exists to pull electrons from the conductor. 

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Lesson Posted on 03/07/2020 Exam Coaching/Engineering Entrance Coaching/IIT JEE Coaching/IIT JEE Advanced Coaching Exam Coaching/Engineering Entrance Coaching/IIT JEE Coaching Exam Coaching/Engineering Entrance Coaching/IIT JEE Coaching/IIT JEE Mains Coaching +1 Exam Coaching/Engineering Entrance Coaching/IIT JEE Coaching/IIT JEE Integrated Coaching less

Kinematics: I.E. Irodov (Problems in General Physics) Problem 1.1

Ashani Ray

I am All India Rank (AIR) holder in all competitive examinations that I appeared, including: - IIT JEE...

Let us solve Irodov problem 1.1 on Kinematics. The problem states: A motorboat going downstream overcame a raft at a point A; τ=60 min later it turned back and after sometime passed the raft at a distance l=6.0 km from point A. Find the flow velocity assuming the duty of the engine to be constant. To... read more

 

 Let us solve Irodov problem 1.1 on Kinematics.

The problem states:

A motorboat going downstream overcame a raft at a point A;  τ=60 min later it turned back and after sometime passed the raft at a distance l=6.0 km from point A. Find the flow velocity assuming the duty of the engine to be constant.

To solve this problem most efficiently we will be using the following concepts:

1. Reference Frames in Kinematics

2. Vectors

Let us now see how to approach the problem by looking at a presentation I created :

 (The video is in Bengali)

 

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Answered on 23/08/2019 Exam Coaching/Engineering Entrance Coaching/IIT JEE Coaching Exam Coaching/Engineering Entrance Coaching/IIT JEE Coaching/IIT JEE Advanced Coaching Exam Coaching/Engineering Entrance Coaching/IIT JEE Coaching/IIT JEE Crash Course +5 Tuition/BSc Tuition Tuition/BTech Tuition CBSE/Class 11/Commerce/Economics CBSE/Class 11/Science/Chemistry CBSE/Class 11/Commerce less

Koushik Das

Professional in Teaching Physics and Mathematics

Follow Arihanth book series. Solve each and every problems. Check the syllabus on net. Follow YouTube. And take best faculties in your home.
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Lesson Posted on 18/07/2017 Exam Coaching/Engineering Entrance Coaching/IIT JEE Coaching/IIT JEE Advanced Coaching

Which Private College Is Better To Take Admission For The CS Branch?

Ajay A S

Author of door to iit (mathemtics for iit-jee ); teaching exp.11 year in most reputed coaching in india....

I'll give you some options which are decently good and not that difficult to get into: Vit Vellore (not Chennai or some other branch): Own entrance exam, entry by paying more also possible, very good campus and infrastructure, good placements (3–4lakh jobs on average like any other... read more

I'll give you some options which are decently good and not that difficult to get into:

  1. Vit Vellore (not Chennai or some other branch): Own entrance exam, entry by paying more also possible, very good campus and infrastructure, good placements (3–4lakh jobs on average like any other private university but almost guaranteed job), too many students, decent reputation. (It is worth if you get admission in first, second or third category at most in counselling, which would cost less than 20 lakhs for 4 years. Paying more for a btech is not worth it.)
  2. Manipal (main campus not Jaipur or Sikkim): Similar to VIT in most aspects
  3. Shiv Nadar University Noida: Relatively new, aptitude based entrance test along with PCM questions, no back door entry (85% in pcm or 120+ in jee for eligibility) so crowd won't be that undeserving, decent placements as it is new (Amazon Flipkart come, Dell cognizant HCl etc recruit in large numbers), very good campus and infrastructure, decent faculty for Cse(other streams like electrical have very good faculty), unique multidisciplinary curriculum, option for minor in any other stream (even non engineering stream like economics).
  4. Pes University Bangalore: Only good for Cse, good placements as in IT hub Bangalore, decent campus, own aptitude based entrance test along with PCM questions.
  5. LNMIIT jaipur, BITS Pilani, Thapar are also private but entry is difficult as they are the best. (Thapar entry is comparatively easy if you are from Punjab)
  6. If you don't get into any of these then Amity, Chandigarh University, SRM Chennai are okay-ish options only for CSE. Entry is easy. (Management quota also applicable)
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