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

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pls explain again

2 years ago by

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if we are finding the final potential of q1 why you had not considered potential due to q2

3 years ago by Bollepalli Ram Teja

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Thank you sir

3 years ago by

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but sir don't you think that the potential at the earthed plate is not zero after earthing in your final result as the potential due to charge at its own location is infinite

3 years ago by Aryan Dwivedi

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SIR Ey will be twice 10sigma by e0 as there is 5 on one side of plate and -5 on other side of second plate sir pls tell where am i wrong ?

3 years ago by Yash Veer Nagar

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Sir why Ep is sigmai/epsilon not ?...it should be sigmai/epsilon due to presence of dielectric?we have not considered effect of dielectric right!....?..

4 years ago by Sridhar Usha Rani

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while calculating potential at point p why dont we consider potential due to induced charge

4 years ago by lakhan munnur

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sir why don't we consider positive induced charge on in inner shell why r u considering negative charge

4 years ago by lakhan munnur

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please reply

4 years ago by lakhan munnur

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any charge on a conductor on outer surface never induces any charge on inner surface but why tell me reasons

5 years ago by Vikky kumar

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sir why the positive charges are not on outside metal surface?

5 years ago by Dharamjeet Singh

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Sir while writing the potential at centre why we did not consider potential due to induced charges?

5 years ago by thanish bolla

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sir how to proceed if earthing is done on a solid conducting metal sphere which is inside an concentric hollow sphere and a point charge is present outside the hollow sphere.

5 years ago by himanshu yadav

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i got the answer

5 years ago by himanshu yadav

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I have 2 doubts. 1.While calculating potential at P...why we are not considering the potential due to induced charges. 2. The answer represents potential at P due to charge on shell as well as due to induced charges?

5 years ago by Rishabh Jain

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sir why you did not consider the electric field in region Y due to charge q2 also

5 years ago by Md Zakie Akhtar Ansari

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How did you calculated Electric Field at Y..!? Shouldn't we consider both the plates while findind field at Y?

5 years ago by Anubhav Kalra

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Will field exist outside the conductor, will it be due to charge q or due to induced charges???

6 years ago by

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it would exist due to the induced charge q on the outer surface like a normal metal conductor(pt. charge at the center)

5 years ago by Alisha Saini

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what will happen when q is at x

6 years ago by

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why is charge distribution uniform on the outer surface?

6 years ago by Raghu Vamshi

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Sir, If the induced charges balance out the electric field and also the potential due to induced ve and -ve charges cancel out only kq/x should be remaining??? Please clarify my doubt

7 years ago by Pratyush Ranjan Roul

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sir wat is uniqueness theorem how does this theorem explain charge resides in outer surface of conductor???please reply as soon as possible sir

7 years ago by sachin

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I mean to to say that if we get both the above combinations just under a single system of plate then also this concept that charges on the outer plates of the system are equal and are half the total charge on the system of plates

7 years ago by manan singh

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Namsty sr i am asking that it is always be there that in an parallel isolated plates always the charge on outer plates of system is half the total charge on whole system of many numbers of plate connectiong in any way ( some plates are connected to earth and some plates are connected to other plates of the system via wire)

7 years ago by manan singh

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sir will q2 produce any EF if yes..then where??

7 years ago by

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every charge produces EF everywhere from the charge to infinity...

7 years ago by Physics Galaxy

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sir will q2 produce any EF if yes..then where??

7 years ago by

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why you are asking same question again... it distracts other viewers... pl take care from next time...

7 years ago by Physics Galaxy

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why potential due to induced charge in b is not considered and also in many cases potential due to induced charge on one surface is taken.why it is so? why dont we calculate potential due to both induced surfaces?

7 years ago by ariya

Ans 1 ->

electric field lines donot penetrate metal shell all induced charges neutralise.

5 years ago by shreya juneja

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sir why should we not consider charge distribution on both surfaces of each sphere?

7 years ago by sesha sai

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It is one big fat shell..

7 years ago by Ricky

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Can we apply charge conservation in the case of two capacitors connected through resister? For example let us say i have two capacitors with some initial charge , now if i connect them with resisters then final voltage can be calculated by equating the sum of initial charge and final charge. But since there is a resister in between caps, it will take some energy means some charge lost, is this correct?? Thanks in advance-

8 years ago by Rajasekhar Nagulapalli

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I think Ey is twice the result you gave because of the presence of q2. Please confirm. Thanks

8 years ago by Uri Groisman

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I am also agree

5 years ago by vasudev kesharwani

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Sir is plate you have taken is of finite length? Because infinte length plate won't have any zero potential point (not even at infinty ) and hence we can never find out absolute potential. But in your video you have assumed the potential on the plate to be V so it think you have taken a finite plate because for a finite plate potential could be found out as its potential at infinity have is zero for a finite plate. Sir similarly in some books it is written that potential on the capacitor plate is V. Sir then is the capacitor plate also of finite length? Because if it had been infinte then we can never write its absolute potential as we can neve define a point were its potential would be zero. Sir say we assume the plate to be finite then why the books say that the electric field by the plate of the capacitor is sigma/2€0 ? This is the expression for the electric field for infintely long charged plate but we just now said that the plates of the capacitor needs to be of finite length.

8 years ago by Krishna Ybb

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why does flux of a positive charge terminate on negative charge of same magnitude?

8 years ago by Nishit Goyal

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why charges resides on the surface of conductor?

8 years ago by Nikunj Gupta

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due to mutual repulsions among the like charges.these like charges moves away from each other and outer surface is the extreme region where these charges can feel minimum repulsion and hence charges reside at outer surface comfortably.

8 years ago by harshvardhan shukla

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Sir I'm unable to understand why the net electric would be zero inside the hollow spherical region. If possible could you please provide some quantitative explanation for this?

8 years ago by Akshay Bansal

Ans 1 ->

quantitatively, net charge for a gaussian surface passing through the point of observation (which happens to be inside the hollow sphere), is ZERO. and hence the field is zero.

8 years ago by ANURAG KAUSHIK

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if net electric field is not zero inside the metal the free electrons would continuously move in the opposite direction of net electric field till the induced EF will balance ext EF .

7 years ago by sesha sai

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IS ELECTRIC FIELD INSIDE A CONDUCTOR IS ALWAYS ZERO?

9 years ago by srinivas

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Yes...

9 years ago by Physics Galaxy

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Due to static charges... if charges are moving... then it is No...

9 years ago by Physics Galaxy

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sir will there not be any induction on the inner sphere due to the outer sphere? Why are we not accounting that in calculating the charge flown to earth?

9 years ago by Ujjwal Verma

Ans 1 ->

yes of course there will be induction as u said. but the induced negative charges and induced positive charges r = in number and equidistant from centre of inner sphere due to which net potential due to induced charges will come out to be zero

8 years ago by harshvardhan shukla

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how is the expression for potential due charge q kq/3a

10 years ago by tamil selvan

Ans 1 ->

consider q charge to be concentrated at the centre of sphere A. hence this q point charge will give kq/3a potential at the surface of sphere c.we know that potential at the outer surface of the sphere is equal to the potential at every interior point of the sphere(also at centre).hence the expression of potential due to q charge is kq/3a

8 years ago by harshvardhan shukla

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Respected sir, can you explain me why the distribution of positive induced charge is symmetrical at outer surface?i can understand that due to eccentric position of charge distribution of negative induced charge will not be uniform.is the relation charge density is inversely proportional to the radius of curvature valid for induced charges also?please explain in detail?i will be highly thankful to you.

10 years ago by ARVIND SHARMA

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