Electrostatic Potencial Problem

  • Thread starter Thread starter loba333
  • Start date Start date
  • Tags Tags
    Electrostatic
AI Thread Summary
The discussion focuses on a problem involving two charged particles: a +9 μC charge at the origin and a -2 μC charge at x = L, seeking points where the net electrostatic potential is zero. Participants clarify that the potentials from both charges must be considered, as they have opposite polarities and their effects combine. The solution involves determining distances from each charge at specific points to find where their potentials cancel each other out. Understanding the behavior of electric fields and potentials is crucial for solving the problem. The conversation emphasizes the need to analyze the distances and potentials systematically to identify the zero potential points.
loba333
Messages
36
Reaction score
0

Homework Statement


Here is the problem :
http://i1200.photobucket.com/albums/bb327/loba333/untitled.jpg
ill write it out again aswell
A particle with charge +9 μC is placed at the origin, and another particle of charge –2 μC is at x = L. At what two points is the net electrostatic potential equal to zero?

Homework Equations


V=KQ/r

The Attempt at a Solution


I could understand if they were the same sign charges then there would be an area of 0 field strength.
Could someone please explain to me what's going on and how to solve it.

Cheers
 
Last edited:
Physics news on Phys.org
The charges have opposite polarity, what more could you want?:smile:
 
gneill said:
The charges have opposite polarity, what more could you want?:smile:

sorry i ment same sign charges
 
Both charges have their own electric fields, and their potentials add up. One is negative, the other is positive, and their magnitudes are the same at certain points. Choose the point at x. What is the distance of the selected point from the negative charge when x<L and what is it when x>L? What are the potentials?

ehild
 

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

Charges placed on a hexogon, working out the force and energy
Replies
9
Views
3K
Electrostatic energy of three charges
Replies
8
Views
2K
Electrostatics (four equal point charges)
Replies
14
Views
2K
Question on electric filed of an insulating cylinder
Replies
5
Views
2K
Van der Graaf Generator: Charge, Potential and Redesign Questions
Replies
8
Views
2K
Magnitude of total electrostatic force on a third particle ?
Replies
8
Views
9K
Distances where electrostatic potential is zero
Replies
9
Views
4K
Where is the net electric field zero?
Replies
2
Views
3K
What is the net electrostatic force of the sphere at the origin?
Replies
3
Views
2K
Calculating the Speed of a Moving Charge Using Electrostatic Force
Replies
4
Views
2K

Hot Threads

Recent Insights

Back
Top