Zero Potential and Electric Intensity in a 2D Plane with 3 Point Charges

AI Thread Summary
The discussion revolves around finding points in a 2D plane where the electric potential and electric intensity are zero, given three point charges located at specific corners of a square. The equation for electric potential was derived, leading to a focus on solving for the coordinates in the x,y plane. There is confusion regarding whether the problem pertains to electric intensity or electric field strength, prompting a request for clarification on relevant equations. Participants emphasize the need to remain within the 2D context of the problem. The conversation highlights the importance of correctly interpreting the problem's requirements for accurate solutions.
Lucky7
Messages
7
Reaction score
0

Homework Statement


Let us have a square ABCD (D is in the topleft corner) of size 1 m. Let us have 3 point charges situated in points B, C and D. The charges are following QB=2C, QC=-1C and QD=5C. The task is to find (a) the points/plane where the electric potential is zero and (b) two points where the electric intensity is zero.

Homework Equations


ψ = (1/(4*pi*epsilon))* (Q1/r1+Q2/r2+Q3/r3)=0

The Attempt at a Solution


According to the equation mentioned above I obtain the following equation
2/rB-1/rC+5/rD=0
But now what? Is my current procedure OK?
 
Last edited:
Physics news on Phys.org
Your procedure is OK. If (a) asks for the points in the plane where the potential is zero, you can write it out in x and y and try to solve. Expect to end up rather close to C. in 3D it becomes a deformed sphere.
 
How do I write it in x,y? And why in 3D, I should find the points in 2D not 3D.
Any hint to (b)?
 
Anyone?
 
"I should find the points in 2D not 3D" Good thing you tell us, because it's nowherer in the original posting.

If (x,y) is a point in the x,y plane, what is the expression for rB ?

Wrt (b), does the problem ask for electric intensity, or does it ask for electric field strength ? If so, do you have a relevant equation available ?
 

Thread 'Rolling without slipping on a curved surface'

Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
View full post »
Thread 'Correct statement about a reservoir with an outlet pipe'

Thread 'Correct statement about a reservoir with an outlet pipe'

The answer to this question is statements (ii) and (iv) are correct. (i) This is FALSE because the speed of water in the tap is greater than speed at the water surface (ii) I don't even understand this statement. What does the "seal" part have to do with water flowing out? Won't the water still flow out through the tap until the tank is empty whether the reservoir is sealed or not? (iii) In my opinion, this statement would be correct. Increasing the gravitational potential energy of the...
View full post »
Thread 'A bead-mass oscillatory system problem'

Thread 'A bead-mass oscillatory system problem'

I can't figure out how to find the velocity of the particle at 37 degrees. Basically the bead moves with velocity towards right let's call it v1. The particle moves with some velocity v2. In frame of the bead, the particle is performing circular motion. So v of particle wrt bead would be perpendicular to the string. But how would I find the velocity of particle in ground frame? I tried using vectors to figure it out and the angle is coming out to be extremely long. One equation is by work...
View full post »

Similar threads

Location where the electric potential is zero between charges
Replies
4
Views
2K
Why is electric field at the center of a charged disk not zero?
Replies
4
Views
3K
At what point is Electric Potential zero
Replies
2
Views
2K
Finding the position where the electric field is zero
Replies
2
Views
2K
Potential at a Point: A Question of Solutions
Replies
2
Views
1K
Van der Graaf Generator: Charge, Potential and Redesign Questions
Replies
8
Views
2K
Potential difference between two points in an electric field
Replies
1
Views
2K
Minimizing the Energy of Two Conductors Very Far Apart
Replies
23
Views
2K
Point where the electric field is zero
Replies
1
Views
3K
MIT OCW, 8.02 Electromagnetism: Potential for an Electric Dipole
Replies
1
Views
2K

Hot Threads

Recent Insights

Back
Top