Connecting Students in 221 Countries
 Topic List

PG Interaction

Video Lecture Advance Illustration My Sequence My Bookmark

High School/JEE/NEET/IPhO Physics | 17-19 Yrs

Please select any topic shown in the side navigation bar to participate.

Post your question

 
  1.  
    2. I have seen all the lectures and read the theory many times but I am not able to solve questions. What should I do?
    5 days ago by

    Post your answer here

     
  2.  
    3. sir please explain questions i cant understand by only concepts
    3 months ago by MANISH DANGI

    Post your answer here

     
  3.  
    4. Is there an answer key/ solutions for all QuSets? If not, PLEASE MAKE ONE
    6 months ago by Aryan Ranjan

    Post your answer here

     
  4.  
    5. Sir how did you know that tan 3/4 is 37 degrees
    1 years ago by

    Post your answer here

     
  5.  
    6. Why can't angle be between vector a and vector b How will we know that we have to take angle between particular vector and x axis
    1 years ago by Abhishek Mudduraj

    Post your answer here

     
  6.  
    7. sir, why do we take -53 degrees for angle measurement and note 53 degrees?
    1 years ago by Kaustubh Mani

    Post your answer here

     
  7.  
    8. sir why we have measured the direction of QP vector -F
    1 years ago by Kaustubh Mani

    Post your answer here

     
  8.  
    9. HERE IN POSITION VECTOR OF POINT Q WRT TO POINT P WHY IT IS WRITTEN Rqp INSTEAD OF Rpq vector
    2 years ago by Palak Gupta

    Post your answer here

     
  9.  
    10. pls update the app and make sure we can turn off the captions
    2 years ago by Chethan K Murthy

    Post your answer here

     
  10.  
    11. confusion in the direction of car's direction.
    2 years ago by

    Post your answer here

     
  11.  
    12. i want to meet ashish sir
    2 years ago by

    Post your answer here

     
  12.  
    13. I HAVE DOUBT IN QUESET
    2 years ago by

    Post your answer here

     
  13.  
    14. sir from where i can get solution of Quset.
    2 years ago by Raghuvansh Bhushan

    Post your answer here

     
  14.  
    15. from where i can get solution of Quset.
    2 years ago by Raghuvansh Bhushan

    Post your answer here

     
  15.  
    16. sir how to change speed of video ,???
    2 years ago by LEARNING! PHYSICS!!

    Post your answer here

     
  16.  
    17. how should i resolve Server Error in '/' Application. i am not able to give any mock test
    2 years ago by ASHWARYA

    Post your answer here

     
  17.  
    18. sir what will be the pictorial diagram of this question I'm getting confused about it plz...solve my doubt(last example)at 11:00
    3 years ago by SANKALP

    Post your answer here

     
  18.  
    19. @10: 15 how root 6 upon root 7
    3 years ago by

    Post your answer here

     
  19.  
    20. really nice explaination of concepts.thank you sir
    3 years ago by

    Post your answer here

     
  20.  
    21. Sir, can we use Triangle law in case of parallelogram vectors.
    3 years ago by

    Post your answer here

     
  21.  
    22. sir the triangle rule as per ur
    4 years ago by DEBASIS PRADHAN

    Post your answer here

     
  22.  
    23. solution of question set is not available so how can we get the solution of incorrect answer of question set.
    4 years ago by Chandan Kumar

    Post your answer here

     
  23.  
    24. In this video, sir said that a vector can have maximum 2 rectangular components, but when we resolve a vector along x, y, z axis (i^ , j^ and k^) then all these three components are perpendicular to each other, so is the statement that vector can have maximum 3 Rectangular components true?
    4 years ago by

    Post your answer here

     
  24.  
    25. please explain representation of unit vectors
    4 years ago by NAGARAM Choudhary

    Post your answer here

     
  25.  
    26. how to start my course
    4 years ago by Saikrishna

    Post your answer here

     
  26.  
    27. sir i am starting my eleventh . i want your guidence to acheive very good rank in jee advanced, olympiads such as ipho.
    4 years ago by Saikrishna

    Post your answer here

     
  27.  
    28. sir i will finish physics in january is it god or not
    5 years ago by suresh kumar sharma

    Post your answer here

     
  28.  
    29. can you explain how you get the answer toQuSets
    5 years ago by Rajitha Suwaris

    Post your answer here

     
  29.  
    30. Vector which is perpendicular to (a cos ?)î (b cos ?)j is given by
    5 years ago by Om Makode

    Post your answer here

     
  30.  
    31. @ 2:41, the direction of vector can be North-east direction..?Kindly check it and reply me plz
    5 years ago by Saurabh utekar

    Post your answer here

     
  31.  
    32. sir.....plzzz solve HC Verma..... and DC pandy unsolved exercise
    5 years ago by Praveen Kumar
    Ans 1 ->
    sir itself is a kind of hc verma and dc pandey
    5 years ago by sankalp
    Ans 2 ->
    Thats true
    5 years ago by Jambu Ganesh

    Post your answer here

     
  32.  
    33. What is the meaning of "positive direction of x axis"?
    5 years ago by Yashaswini Joshi
    Ans 1 ->
    it is a convention we take in the coordinate axis . that if we travel towards the right of the x-axis from the origin it is the positive x-axis
    4 years ago by Saikrishna

    Post your answer here

     
  33.  
    34. Sir, can"t we take 30-degree angle between the x-axis and Vector V instead of between Y -axis and Vector V.
    5 years ago by
    Ans 1 ->
    no because in the question its given 30 degrees east of north not 30 degrees north of east
    4 years ago by Saikrishna

    Post your answer here

     
  34.  
    35. Nice one
    5 years ago by shireen singh

    Post your answer here

     
  35.  
    36. why is there no concept like vector division
    5 years ago by Paras Kumar
    Ans 1 ->
    Well apparently scientist never found need for that ! at least thats what i think !
    5 years ago by Harshit Pathak

    Post your answer here

     
  36.  
    37. sir i am not able to solve some of the question of question set...pls help
    5 years ago by Souvam Das

    Post your answer here

     
  37.  
    38. How can find projection of vector A on another vector B
    5 years ago by Suryanarayana Upadhyay

    Post your answer here

     
  38.  
    39. How can find projection of vector A on another vector B
    5 years ago by Suryanarayana Upadhyay

    Post your answer here

     
  39.  
    40. why do ou say that i cap * j cap is "-k cap" instead of k cap in 9:56
    6 years ago by MAHENDRA SINGH
    Ans 1 ->
    edit i cap * k cap should be j cap but you say - j cap why please answer sir
    6 years ago by MAHENDRA SINGH
    Ans 2 ->
    i cap * k cap is -j cap it is so because the direction is reversed, hence it is -j cap and k cap * i cap is j cap.
    5 years ago by Satyam Mishra

    Post your answer here

     
  40.  
    41. Where to draw the reference line. Whether to draw it through tail of the arrow or through the head of the arrow?
    6 years ago by DineshKumar Varadharajulu
    Ans 1 ->
    it can be drawn from the tail of the arrow but i am not sure......
    6 years ago by nishkarsh aggarwal

    Post your answer here

     
  41.  
    42. Sir,how to derive cosine rule .I can't able to understand how it is derived.I'm confused because in HCV the formula of triangle law of addition is written as va² b² 2abcosØ and in cosine rule it is written as va² b²-2abcosØ. Thanking you in anticipation.
    6 years ago by Divyang Tiwari

    Post your answer here

     
  42.  
    43. Sir, I'm always confused while using sin theta, cos theta and tan theta. Where do we have to use these by solving vector problems. And one more thing I want to know is how do we come to know which angle do we have to find and b/w which two vectors. Sir, can you just help me out to get rid of these problems I face usually.
    6 years ago by Nevil Tanna

    Post your answer here

     
  43.  
    44. Sir pls show how to represent them in combined form
    6 years ago by Hardik garg

    Post your answer here

     
  44.  
    45. can i get solutions of quset1 of basic vectors sir?
    6 years ago by GEETHU MOHAN

    Post your answer here

     
  45.  
    46. Sir, pls..explain right hand palm rule..?
    6 years ago by Amit Vikram Raj
    Ans 1 ->
    Just trying to explain u my friend Thumb represents the direction of motion of conductor Index finger represents the magnetic field direction Middle finger represents the direction of induced current
    6 years ago by PADMA

    Post your answer here

     
  46.  
    47. sir i cant understand the last step where u wrote that c vector = c(30 alpha angle) . And in the first few steps u got theta = 30 degrees , but how can we get it 30 im getting it as 60 degrees , as theta is greater than alpha . please explain sir . thanks
    6 years ago by eshwar

    Post your answer here

     
  47.  
    48. Good
    6 years ago by nukil sharma

    Post your answer here

     
  48.  
    49. A ray of light is incident on a plane mirror along a vector i j-k. The normal on incidence point is along i j.find a unit vector along reflected ray? Plz in solving this problem
    6 years ago by Yogita

    Post your answer here

     
  49.  
    50. Sir, help me in this question- Prove that A.(A×B)=0
    7 years ago by Manjul Kumar

    Post your answer here

     
  50.  
    51. sir it can be done easily by determinant method where you have explained it sir??
    7 years ago by sagar

    Post your answer here

     
  51.  
    52. what is a simple definition of tensors?
    7 years ago by piyush gera
    Ans 1 ->
    tensor cannot be defined in simple definition, if it is defined then you will not be able to understand it properly...
    7 years ago by Physics Galaxy

    Post your answer here

     
  52.  
    53. How to download videos lecture
    7 years ago by Vinamra Sachan
    Ans 1 ->
    use youtube downloader or wait for the videos in USB media, we will release by end of 2016 at a nominal price...
    7 years ago by Physics Galaxy

    Post your answer here

     
  53.  
    54. How can we tell angle between any two vectors without using protactor ??
    8 years ago by Sanchit Agrawal
    Ans 1 ->
    We can determine the angle between 2 vectors without using protractor that is by dot product and cross product.... A.B=ABcos(ANGLE) and A*B=ABsin(ANGLE)
    7 years ago by Pooja Madhurima

    Post your answer here

     
  54.  
    55. How can we tell angle between any two vectors without using protactor ??
    8 years ago by Sanchit Agrawal
    Ans 1 ->
    we cAN DETERMINE THE ANGLE WITH THE HELP OF DOT PRODUCT OR CROSS PRODUCT
    7 years ago by HARENDRA KUMAR

    Post your answer here

     
  55.  
    56. How to tell angle between any two vectors without using protactor ??
    8 years ago by Sanchit Agrawal
    Ans 1 ->
    using formula resultant=sqrt(a^2+b^2+2abcosx) where a&b are magnitudes of vector and x is angle..get this equation and make subject xand you get value..
    8 years ago by Manav Patel

    Post your answer here

     
  56.  
    57. why we applied dot product in this question to find out the work done by the force ?
    8 years ago by ayush jain
    Ans 1 ->
    Because work is the dot product of force and displacement.
    7 years ago by Rohit Shiju

    Post your answer here

     
  57.  
    58. is time a vector quantity or scalar? if vector how?
    8 years ago by Kal Wardin
    Ans 1 ->
    Time does not have any directional qualities hence it is a scalar.
    8 years ago by Manav Patel

    Post your answer here

     
  58.  
    59. after seeing this this videos we are doing quset but we are not getting some questions so we need solutions please try to rectify sir
    8 years ago by surya
    Ans 1 ->
    why dont you copy the entire question and ask it here
    5 years ago by Harshit Pathak

    Post your answer here

     
  59.  
    60. yeah the same doubt i am having sir
    8 years ago by surya

    Post your answer here

     
  60.  
    61. in the above video we just used Pythagoras theorem. but as in module 6 we used the cosine rule the triangle rule..why hasn't that rule applied here .
    8 years ago by Mridima krishna

    Post your answer here

     
  61.  
    62. what is the meaning of scalar product??
    8 years ago by bhavyam bhargava
    Ans 1 ->
    the scalar product is also called dot product....it means the product of two vectors is independent of direction
    8 years ago by Ànkùsh Gàrg
    Ans 2 ->
    yes it is not based on direction
    8 years ago by Vivek kushwaha

    Post your answer here

     
  62.  
    63. physical quantities are of 2 types scalarsvectorsand tensors.
    8 years ago by bhavyam bhargava
    Ans 1 ->
    is that a question?
    8 years ago by Kal Wardin

    Post your answer here

     
  63.  
    64. How to find the direction of a three dimensional vector?
    8 years ago by Yash Selot
    Ans 1 ->
    just divide it by its magnitude
    8 years ago by Nabeel Ahmed

    Post your answer here

     
  64.  
    65. why angle fi is negative
    8 years ago by bhavyam bhargava
    Ans 1 ->
    Because it's taken as coordinate
    7 years ago by Y aditya vardhan reddy
    Ans 2 ->
    I mean Y to x coordinate
    7 years ago by Y aditya vardhan reddy
    Ans 3 ->
    Because we measure angle from + direction of x axis
    7 years ago by Divya r

    Post your answer here

     
  65.  
    66. yes
    8 years ago by bhavyam bhargava
    Ans 1 ->
    Thank You
    8 years ago by R Kalyan Shankar

    Post your answer here

     
  66.  
    67. excellent videos
    8 years ago by bhavyam bhargava
    Ans 1 ->
    Thank you
    8 years ago by R Kalyan Shankar

    Post your answer here

     
  67.  
    68. helped me to get good top 10 rank in my class
    8 years ago by Sachin Ananthakumar
    Ans 1 ->
    Good.You need to improve your rank
    8 years ago by R Kalyan Shankar

    Post your answer here

     
  68.  
    69. is there any short cut method to find cross product of two vectors
    8 years ago by Naman Yadav
    Ans 1 ->
    matrix method or determinant method
    6 years ago by Mihir Meena

    Post your answer here

     
  69.  
    70. in the above video is it true :- vector -b =-b angle(pie-theta)
    9 years ago by johnsen
    Ans 1 ->
    yes
    8 years ago by Tanay Gawade
    Ans 2 ->
    yes
    8 years ago by Tanay Gawade
    Ans 3 ->
    yes
    4 years ago by BAMDEV BHATT

    Post your answer here

     
  70.  
    71. can i find magnitude of c by sin rule and alpha by cos rule
    9 years ago by johnsen

    Post your answer here

     
  71.  
    72. how to find angle between 2 vectors
    9 years ago by johnsen

    Post your answer here

     
  72.  
    73. in the above video why didn't u draw any coordinate axes is it must to draw reference lines(like coordinate axes) also are these 2 vectors(both are parallel and hv the same length) same:- one starts from(-4-1)and the other starts from (48)(note there will be comma after -4 and 4 respectively) wht are localised vectors give detailed examples of localised vectors
    9 years ago by johnsen
    Ans 1 ->
    can you explain which module
    8 years ago by Tanay Gawade

    Post your answer here

     
  73.  
    74. in pictorial representation in ncert there are no coordinate axes or any other reference lines drawn in many fig .why is it so
    9 years ago by johnsen
    Ans 1 ->
    ncert bekar hai.sir ne sahi padaya hai
    8 years ago by bhavyam bhargava

    Post your answer here

     
  74.  
    75. Sir why did you write pie - theta as (-theta) in the video?
    9 years ago by Yash Selot

    Post your answer here

     
  75.  
    76. sir if we apply the cosine rule here then the ans. would be sq.root of a^2 + b^2-2abcos (theta) or sq.root of a^2-b^2-2ab cos(theta) as we take d vector as -b
    9 years ago by sarbani baidya roy
    Ans 1 ->
    sorry as we take the vector as -b then what would be the ans.?
    9 years ago by sarbani baidya roy

    Post your answer here

     
  76.  
    77. sir please solve the problem you have taken in this video
    9 years ago by pranshu nema

    Post your answer here

     
  77.  
    78. sir what is sine inverse?
    9 years ago by pranshu nema
    Ans 1 ->
    sin^-1
    8 years ago by bhavyam bhargava

    Post your answer here

     
  78.  
    79. When we add a vector pictorially why do we draw and add the vectors by keeping the end point of one vector on the starting point of the other? What if we add the vector by keeping the end point of one vector on the end point of the other vector?
    9 years ago by Yash Selot
    Ans 1 ->
    there is a rule that while joining vectors the tail of one side should be connected to the tail of one vector and the head of other side should be connected to the head of the second vector so this way u can represent the vector pictorially as for the example mentioned here it is for explanation look through other videos u will understand
    9 years ago by sarbani baidya roy
    Ans 2 ->
    there is a rule that while joining vectors the tail of one side should be connected to the tail of one vector and the head of other side should be connected to the head of the second vector so this way u can represent the vector pictorially as for the example mentioned here it is for explanation look through other videos u will understand
    8 years ago by Tanay Gawade

    Post your answer here

     
  79.  
    80. please tell how to use sine & cosine rule in the example ?
    9 years ago by Neelesh Jain

    Post your answer here

     
  80.  
    81. Can we apply the rule of rectangular components of a vectors when the components of the resultant vector are not perpendicular to each other?
    9 years ago by Yash Selot
    Ans 1 ->
    No by definition, rectangular components of vectors are two perpendicular components only...
    9 years ago by Physics Galaxy
    Ans 2 ->
    yes true
    8 years ago by Tanay Gawade
    Ans 3 ->
    yesss
    7 years ago by Sanakta Misra
    Ans 4 ->
    correct
    6 years ago by

    Post your answer here

     
  81.  
    82. Sir why did you took thethe measure of angle between a vector and b vector as pie - theta in the video?
    9 years ago by Yash Selot
    Ans 1 ->
    In this video angle between the two vectors I have not taken as pie - theta.... here I am using cosine rule for the triangle formed by these vectors and in triangle rule we consider the angle between two sides of the triangle which is pie - theta here....
    9 years ago by Physics Galaxy
    Ans 2 ->
    as 180 degree = pie
    9 years ago by pranshu nema

    Post your answer here

     
  82.  
    83. What are the derivations of these trigonometric laws for vectors i.e. sine rule and the cosine rule?
    9 years ago by Yash Selot
    Ans 1 ->
    These derivation you can find in basic trigonometry in maths of grade XI or for reference click on the link http://www.regentsprep.org/regents/math/algtrig/att12/derivelawofsines.htm to see these derivations...
    9 years ago by Physics Galaxy

    Post your answer here

     
  83.  
    84. Introduction to Physical Quantities
    9 years ago by Deepak Karanam
    Ans 1 ->
    As seen in the video physical quantities are of three types : scalars,vectors and tensors. Now we will be dealing with physical quantities such as scalars and vectors. Scalars are those physical quantities which have only magnitude and no direction and on the other hand vectors are those physical quantities which have both both magnitude and direction.
    9 years ago by Yash Selot
    Ans 2 ->
    Watch Module no 1.You will know it!!!
    8 years ago by R Kalyan Shankar
    Ans 3 ->
    sir in que set 2 after q.no.27 no questions are there pls send some...
    8 years ago by Amit

    Post your answer here

     
  84.  
    85. A bird is flying with 20 m/s in space, what is the velocity vector of bird in terms of i,j and k?
    9 years ago by nidhika sharma
    Ans 1 ->
    We need to specify the direction in which bird is flying then only it can be expressed in terms of unit vectors...
    9 years ago by Physics Galaxy

    Post your answer here

     
  85.  
    86. The sum of magnitudes of 2 forces acting at a point is 16N. The resultant of these forces is perpendicular to the smaller force and has a magnitude of 8N. Find magnitude of smaller force.
    10 years ago by Mudit Surana
    Ans 1 ->
    Question Posting test on forum section BASIC OF VECTORS
    9 years ago by Physics Galaxy
    Ans 2 ->
    a+b=16 a+bcos@=0-------------1 64=a2+b2+2abcos@ 64=a2+b2+2ab(-a/b) from equ. 1 b2-a2=64 (b+a)(b-a)=64 b-a=64/16 from equ.1 b-a=4--------2 b+a=16-----1 by solving b=10 and a=6
    9 years ago by nidhika sharma

    Post your answer here

     
QUICK LINKS
FEATURES
INFO
SITEMAP & POLICIES