Potential of two points how are they same?

  • Thread starter Thread starter nishantve1
  • Start date Start date
  • Tags Tags
    Points Potential
AI Thread Summary
The discussion revolves around understanding the concept of points at equal electrical potential in circuits with resistors. The user is confused about why points E, G, and D are at the same potential in one scenario, while points A, F, D, and G are considered equivalent in another. The explanation highlights that symmetrically equivalent points maintain equal potential due to their geometric arrangement. The user seeks clarification on the symmetry involved when a cell is connected between points A and B, and why current does not flow through certain points. The conversation emphasizes the importance of symmetry in determining electrical potential in circuit analysis.
nishantve1
Messages
74
Reaction score
1

Homework Statement



I am confused here .
Each wire is of resistance R
How in this image

76xQa.png


E G and D are at the same potential

and in this image
pzhfZ.png

How A and F and Dand G are equivalent?

Homework Equations



I don't think any equations will be used in solving this but I guess V =IR might be

The Attempt at a Solution



In the first image what I figured out is since the points E G and D are at one resistor drop from H so they are at the same potential but I am not able to figure out in the second situation

I am taking help of this website
http://physicstasks.eu/uloha.php?uloha=285
but its quiet confusing
I JUST WANTED TO KNOW WHATS THE METHOD BEHIND FINDING POINTS WITH EQUAL POTENTIAL IN SUCH CASES ?
 
Last edited:
Physics news on Phys.org
Symmetrically equivalent points are at equal potential. Those points are equivalent which transform into each other during a symmetry operation.
Have you got a cube? Turning it around the body diagonal HB by 120° would not change anything: It looks the same as before. If you connect the battery to the points H and B, on the same axes, nothing happens again as the battery transforms into itself.
In the other case, the battery is in the mirror plane EHCB. The point A is mirror image of F, and D, G are also mirror images to each other, so they are equivalent.

ehild
 

Attachments

  • symmetry.JPG
    symmetry.JPG
    9.5 KB · Views: 470
Thank you ! So much respect .
 
Just a little more help . Please explain what's up with this one
1rjNe.png

Where is the symmetry here if the Cell is connected btw A and B ?
Also in the second figure why doesn't current flow through FG and AD ?
 
Last edited:
It is a mirror plane again...

ehild
 

Attachments

  • sym2.JPG
    sym2.JPG
    4.4 KB · Views: 418

Thread 'Errors and significant figures'

I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
View full post »
Thread 'A cylinder connected to a hanging mass'

Thread 'A cylinder connected to a hanging mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
View full post »

Similar threads

Potential difference between two points in an electric field
Replies
1
Views
2K
Finding potential at a point in capacitor
Replies
2
Views
2K
How to determine if electrical components are connected in parallel or in series?
Replies
10
Views
901
What is the potential at point D in the circuit
Replies
9
Views
2K
Determine the Electrical potential at a given point
Replies
7
Views
1K
Minimizing the Energy of Two Conductors Very Far Apart
Replies
23
Views
1K
Electric potential at an unknown point
Replies
2
Views
1K
Calculating eletric potential using line integral of electric field
Replies
1
Views
2K
Potential difference between two points in a loop
Replies
14
Views
3K
The flux through a cylinder from a charge at the origin
Replies
5
Views
356

Hot Threads

Recent Insights

Back
Top