Symmetry & Field of an Infinite uniformly charged plane sheet

AI Thread Summary
The discussion centers on the symmetry of an infinite uniformly charged plane sheet and its electric field. It emphasizes that due to the uniformity of the plane, there is no preferred direction parallel to the plane, leading to the conclusion that the electric field must point directly out of the plane or be zero. Participants reference Gauss's Law to explain that the field's independence from the x-coordinate is a result of this symmetry. The confusion arises regarding how this symmetry translates to the field's characteristics. Ultimately, understanding the implications of symmetry is crucial for grasping the behavior of the electric field in this scenario.
Shreya
Messages
187
Reaction score
64
Homework Statement
Think of a symmetry now which will tell you that the magnitude of the electric
field is a constant, independent of the x-coordinate for a infinite uniformly charged plane sheet?
Relevant Equations
Electric Field of uniformly charged infinite planar sheet = (surface charge density)/ (2× permittivity of free space)
Will translation parallel to x-axis work ?
Else please suggest the symmetry?
And does symmetry here refer to the symmetry of the sheet which causes the symmetry of the field or something else?
Please be kind to help.
 
Physics news on Phys.org
Think about being on an infinite plane. I look around and everywhere I look is identical. Anywhere I go on the plane there is no preferred direction parallel to the plane. Therefore the field cannot point in any particular parallel direction anywhere so it must point only directly out of the plane everywhere (or be zero). Have you learned Gauss's Law?
 
Thank you, So here, symmetry means being it (sheet and its field) the same irrespective of position.
But, I am still confused about the field being independent of x coordinate.
This is the whole question. Can you please explain on which symmetry shows field in independent of x coordinate.
20210506_081531.png

hutchphd said:
Think about being on an infinite plane. I look around and everywhere I look is identical. Anywhere I go on the plane there is no preferred direction parallel to the plane. Therefore the field cannot point in any particular parallel direction anywhere so it must point only directly out of the plane everywhere (or be zero). Have you learned Gauss's Law?

Yes, I have learned gauss law and have learned to derive the field of an infinite plane sheet. This is the image corresponding to the question.
Please be kind to help
Screenshot_20210506-082106_Drive.png
 
Thread 'Collision of a bullet on a rod-string system: query'
In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
Back
Top