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

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  1.  
    2. SIR IN THIS WHY 100V BATTERY IS USED CAN I APPLY BATTERY OF ANY OTHER VOLTAGE???
    1 years ago by Tanmay Mangal

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  2.  
    3. sir in this why 100V BATTERY IS APPLIED, CAN WE APPLY ANY BATTERY OF ANY OTHER VOLTAGE??
    1 years ago by Tanmay Mangal

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  3.  
    4. I'm blessed to have you sir. Thank you so much sir .
    2 years ago by

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  4.  
    5. Good
    2 years ago by Dharmveer

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  5.  
    6. Sir can we do it by normally solving the resistors rather than solving this Q by this way??
    2 years ago by Dibyojyoti Bhattacharjee

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  6.  
    7. in writibg kvl for a-b u did not consider 6ohm resistance why???????????????????????/
    2 years ago by

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  7.  
    8. sir how is I1-I2 taken in 2nd equation?
    3 years ago by

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  8.  
    9. sir, could u upload the solutions to the answers of qsets
    4 years ago by

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  9.  
    10. Imagining a Y shape part of ckt the point of intersecion of three lines in Y say O.What ratio will current divide here if resistance of both the branches is 0
    4 years ago by Amish Kumar Singh

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  10.  
    11. Sir please solve the unsolved Illustration 7 as home assignment through method of symmetry of fundamental class 9 of electrical circuit. I am unable to solve it by this method.
    5 years ago by Manu

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  11.  
    12. sir using kcl im getting 5/14 ampere .by branch mainpulaion i kept 4ohm and 6ohm in series ..finally i got this where im going wrong(did with single varibale)
    5 years ago by Sarju Panchal

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  12.  
    13. by watching your video lectures im improving in physics and if all the srudent follows sirs video no one will get less than 60% in jeee avdanced physics
    5 years ago by Sarju Panchal

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  13.  
    14. SIR YOUR TECHNIQUE IS FANTASTIC ONCE I USED TO FEAR OF THIS QUESTIONS YOU ARE GR8 SIR.....
    5 years ago by Sarju Panchal

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  14.  
    15. Hindi language mein video kese dheke
    5 years ago by KAMLESH VAISHNAV

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  15.  
    16. For those who r having doubts whether these videos are helpful for jee mains or not...yes!!!!these videos r enough for jee mains..but what u need to do on ur own is to practice Quset given right below the list of videos after completion of every set of video...If u r looking of advance level then go to homepage of this website and u will find ADVANCE ILLUSTRATIONS in the list ..See them !! Thank You!
    5 years ago by varshith varshi

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  16.  
    17. explain superposition of current
    5 years ago by Gavin Birla

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  17.  
    18. sir can we change the position of resistance in parallel combination also
    5 years ago by Avinash Pandey

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  18.  
    19. SIR KVL ME JAB HUM CLOCKWISE CURRENT LE RAHE HAI TO HUM TO NEGATIVE TERMINALSE ENTER KAR RAHE HAI TO WAHA PAR POTENTIAL TO NEGATIVE HONA CHAHYIA
    5 years ago by Avinash Pandey

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  19.  
    20. Does the direction of the arrow matter a lot?
    5 years ago by priyam mahajan

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  20.  
    21. sir in kvl equation how to simplify first euation
    6 years ago by md sufyan

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  21.  
    22. current analyis qusetno2 question number 13 is mistake because a resistane value not seen
    6 years ago by narayan kalani

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  22.  
    23. sir current analysis qusetsno1 question no 8 answer is incorret
    6 years ago by narayan kalani

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  23.  
    24. how can i get the solution of qusets ?
    6 years ago by narayan kalani

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  24.  
    25. Could you please show the same using Kirchoff's laws? Using that we get I=10/21
    6 years ago by Yukti Khosla
    Ans 1 ->
    but i am getting I as 22/21A using KVL. maybe your steps are wrong. check it again
    6 years ago by ABHISHEK SHANKAR

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  25.  
    26. Why is the voltage above x(namely y) 100-x?
    6 years ago by Yukti Khosla

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  26.  
    27. Why the 6 ohm resistance is not considered in KVL eqn from A to B? kindly let me know. Regards.
    6 years ago by Ayushi Chaugaonkar
    Ans 1 ->
    because for loop 1 you can see that current I is flowing across 3 ohms in direction opposite to direction we are considering that is from A to B clockwise... so we add 3ohm resistance but if you see for the 6ohm resistance the current I does not flow through that branch and plus A and B is open so we do not consider the potential drop across 6ohm as no current is flowing through it. hope this helps
    6 years ago by ABHISHEK SHANKAR

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  27.  
    28. Ques- Sir, how can we solve it with KVL?
    6 years ago by Mihir khare

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  28.  
    29. Fundamental class 9 time 29:20.. The symmetry is not clear.. Please explain..
    6 years ago by

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  29.  
    30. sir i have problem in simplifying the crk please help
    6 years ago by utkarsh pal

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  30.  
    31. HOw to solve by KCL method ??? Please sir HELP !!
    6 years ago by Pratyush Ranjan Roul

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  31.  
    32. sir in your fundamental classes on electrical circuits lecture 3 I could'nt solve the homework illustrations you gave by KCL. Please tell me how to solve them.
    6 years ago by karan kamleshbhai patel

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  32.  
    33. sir i did not understand how did you write that current in lower 2 branches be same that is i1 and different in upper branch.
    7 years ago by Sruthi rajanala
    Ans 1 ->
    If you carefully see then the path from 100V terminal to 0V terminal for lower two branches is symmetric and identical thats why current will be same in these two branches... as the effective resistance of these two branches from start to end point is same current will distribute equally...
    7 years ago by Physics Galaxy

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  33.  
    34. How can i get the solution of QuSets?
    7 years ago by Prayush Dawda
    Ans 1 ->
    QuSets solutions are not available as of now... whenever these will be available we will inform our users by mails... you can also attempt QueGrid at quegrid.com where all questions are timebound as well as solutions are available...
    7 years ago by Physics Galaxy

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  34.  
    35. Sir can I get the solution of ckt diagram in the video it would be very helpfull
    7 years ago by Siddhant Mahapatra

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  35.  
    36. Sir this same problem is in HC Verma. The answer given there is 3R/4. I am really confused. Please help. Thank you.
    7 years ago by Ram Bharadwaj
    Ans 1 ->
    Ans. is correct(4r/5).check correctly. Q.41(b) in subjective exercise.
    7 years ago by Shah Darshan Jagdishbhai

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  36.  
    37. how can we solve this problem by KCL method??
    7 years ago by

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  37.  
    38. sir i didn't understand how you shifted the battery ?? sir shouldn't the +ve terminal of 20 v battery be in front of the +ve terminal of the 10 v battery? sir plz reply...
    8 years ago by Vartika
    Ans 1 ->
    ok because if you connect the battery in the sense you are talking about The current frlows from - to + in 20V battery and in 10 battery in rightward direction but in the original diagram you see that current flows from - to + in 10v battery but it flows from - to + in leftward sense so you reverse it
    8 years ago by Charan Sai
    Ans 2 ->
    consider the current in 20v battery, it will flow from ve terminal of 20v to -ve terminal of 20v so basically the current is flowing from -ve terminal of 10v to =ve terminal of 10 so it is increasing right? so we add the two potentials and it will be 30v.. hope this helps
    6 years ago by ABHISHEK SHANKAR
    Ans 3 ->
    sorry typo its not = it is ve one more edit current ve terminal of 20v to -ve terminal of 20v
    6 years ago by ABHISHEK SHANKAR
    Ans 4 ->
    sorry typo its not = it is ve one more edit current ve terminal of 20v to -ve terminal of 20v
    6 years ago by ABHISHEK SHANKAR
    Ans 5 ->
    sorry typo its not = it is ve one more edit current ve terminal of 20v to -ve terminal of 20v
    6 years ago by ABHISHEK SHANKAR

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  38.  
    39. how do we come to know when to take same currents and take different currents?? sir plz reply
    8 years ago by Vartika
    Ans 1 ->
    always see by symmetry...symmetric paths have identical current distribution...
    7 years ago by shreya sood

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  39.  
    40. sir why are we considering i2 and i3 as different currents even though resistances and potential differences are same?? sir plz reply
    8 years ago by Vartika
    Ans 1 ->
    See properly...even if the value of resistances is same the net resistance in these two branches is different....the paths in which the current is taken as i2...are same by symmetry..with two resistances and a branch...whereas the path of i2 current consist of only two resistances...Hope it helps!!!
    7 years ago by shreya sood

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  40.  
    41. i cant understand what is meant by purely resistive circuits?
    8 years ago by Praveen Kumar
    Ans 1 ->
    it means a circuit in which no ideal wire is attached due to which current flows through that least hindered path
    7 years ago by Rahul Chauhan
    Ans 2 ->
    it means a circuit in which no ideal wire is attached due to which current flows through that least hindered path
    7 years ago by Rahul Chauhan
    Ans 3 ->
    7 years ago by Rahul Chauhan
    Ans 4 ->
    7 years ago by Rahul Chauhan

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  41.  
    42. how do we know potential X is either less or more than max or min of 6 or 8 or 10 V ?? because in calculation we need to provide -ve or +ve value to current depending on its path. Tnx for video's they are awesome.
    8 years ago by Geeta Singh

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  42.  
    43. if anyone dont understand please note that this question can be very easily solved using y delta transformation for details search on wikipedia link is this https://en.wikipedia.org/wiki/Y-%CE%94_transform
    8 years ago by akanksh

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  43.  
    44. here sir is using current division rule for n branches for details please visit https://en.wikipedia.org/wiki/Current_divider to see general formula
    8 years ago by akanksh

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  44.  
    45. note that this problem can be very easily solved using y delta transformation if anyone dont know type this is wikipedia you will get formulas and procedure
    8 years ago by akanksh
    Ans 1 ->
    By star delta you will be able to find equicalent resistance only... And by this method you can find current and p.d. across any resistance if battery is attached
    7 years ago by Shah Darshan Jagdishbhai

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  45.  
    46. can u please upload a video on STAR and DELTA conversions
    8 years ago by Nishant Meena
    Ans 1 ->
    star delta is not useful for high school level
    8 years ago by RAM MISHRAA
    Ans 2 ->
    it is useful for jee aspirant
    8 years ago by rohit singh
    Ans 3 ->
    i am a jee aspirant ...please upload video for star and delta method ...it would be really helpful
    7 years ago by srinibash behera

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  46.  
    47. sir i did not understand how did you write that current in lower 2 branches be same that is i1 and different in upper branch.
    8 years ago by rajat puri
    Ans 1 ->
    Here due to symmetry the bottom two paths are same as they have two resistances and a branch ..whereas the third path consist of a single resistance followed by two branches...Hope it helps!!!
    7 years ago by shreya sood

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  47.  
    48. sir please tell me can we apply the same rule kvl for a loop which doesn't contain any source of emf.
    8 years ago by srinivas
    Ans 1 ->
    yes
    8 years ago by Shreyas Shree
    Ans 2 ->
    then check the case in which a solenoid with varying current placed in a closed circuit doesnt obey kvl equation
    8 years ago by srinivas

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  48.  
    49. Sir please explain the part where u applied KVL for ABCD and why it +4I2??
    8 years ago by Venkat S Raghavan
    Ans 1 ->
    it is because we are moving from c to d but current I2 is moving from d to c so we will add it
    6 years ago by ABHISHEK SHANKAR

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  49.  
    50. sir if we connect a 22/3 v battery across 3 ohm and 5 ohm p.d across 5 ohm resistor will not be 22/3 v so we have to connect a battary with different emf
    8 years ago by KRISHNA VADLAMANI

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  50.  
    51. sir i didnt understand why didnt you consider potential drop across the resistance 6
    8 years ago by Aishwarya Roogi
    Ans 1 ->
    right part of the circuit is open so current=0 as per formula ir=0 so potential drop=0
    8 years ago by akanksh

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  51.  
    52. sir why cant we use branch manipulation over for upper loop and solve the problem
    8 years ago by Aishwarya Roogi
    Ans 1 ->
    that is only possible when they are connected in series
    6 years ago by ABHISHEK SHANKAR

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  52.  
    53. sir the two resistances 6 and 3 are connected in series so how can you take them in parallel ones and series ones
    8 years ago by Aishwarya Roogi
    Ans 1 ->
    check the potential at the point before 6 and 3 ohms by connecting it to an imaginary battery. the potential at those points is same so its parallel.
    6 years ago by ABHISHEK SHANKAR

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  53.  
    54. sir in the starting..why have you taken different magnitude of current in the middle resistor of the first three resistors.. i.e you have taken I1 and I1 for above and below resistor but I2 in the middle one...As the resistors are same 'same amount of current should pass through each resistor...
    8 years ago by Manik
    Ans 1 ->
    Due to symmetry... top and bottom paths are same but the middle path is not same in middle path total two resistances connected to the right terminal whereas in top and bottom three are there with the middle branches...?
    7 years ago by shreya sood
    Ans 2 ->
    This answer was posted by sir on youtube...Hope this helps!!!
    7 years ago by shreya sood

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  54.  
    55. sir please can you tell me how the current in lower two branches will be the same and different in upper branch by symmetry
    8 years ago by Aishwarya B Roogi

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  55.  
    56. sir how have you used kcl without knowing the direction of current and supposed it out be outflowing we dont know direction so why doesnt it affect the equations.
    8 years ago by Manmohit Singh Pahwa
    Ans 1 ->
    answer comes with sign
    7 years ago by Rithik Chopra

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  56.  
    57. why current will not pass through a branch if it is not returned to circuit????? plz explain
    9 years ago by harivikas

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  57.  
    58. Sir, i couldn't understand the last step where you have written V=E-IR,here you have written E=3 volts..i couldn't understand why will it be 3 volts ?please explain..thanks..
    9 years ago by Vineet Chatterjee
    Ans 1 ->
    Pl see the link http://physicsgalaxy.com/lectures/1/59/1140/Battery%20Grid to understand this.
    9 years ago by Physics Galaxy

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  58.  
    59. sir i did not inderstood the distribution of current i.e. initially i1 in upper branch and finally i1 in lower branch.
    9 years ago by himanshu chhabra
    Ans 1 ->
    Here we are using the symmetry argument for this... see in upper 5 ohm resistance potential difference is x so current in it is i1 = x/5 similarly across lower 5 ohm resistance also potential difference is x so here also the current will be same...
    9 years ago by Physics Galaxy

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  59.  
    60. sir i did not understand how did you write that current in lower 2 branches be same that is i1 and different in upper branch.
    9 years ago by himanshu chhabra

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  60.  
    61. how did you apply kvl in 3rd equation when its only valid for a closed loop
    9 years ago by himanshu chhabra
    Ans 1 ->
    KVL Equation is just to calculate the potential difference between any two points of circuit... we are using the form of energy conservation in any path of circuit so no restriction is there for a closed loop...
    9 years ago by Physics Galaxy

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