Electric Potential at A and B: Find the Answer

AI Thread Summary
The discussion revolves around calculating electric potential at two points, A and B, with the user successfully finding the potential at A but struggling with B. Participants emphasize the need for the user to share their calculations to identify errors. There is a clarification that Coulomb's Law pertains to force between charges, not directly to electric potential. The conversation highlights the importance of using the correct formulas for electric potential in these calculations. Accurate understanding and application of the relevant formulas are crucial for resolving the user's issue.
moeug1999
Messages
8
Reaction score
0
Homework Statement
The figure below shows two point charges q1 = +5.4 10-8 C and q2 = -5.5 10-8 C.
(a) Find the potential at A
(b) Find the potential at B.
Relevant Equations
Coulombs Law
I found the potential at A, however I tried doing it with B but it says I have the wrong answer.
 

Attachments

  • Screen Shot 2020-01-31 at 10.44.53 AM.png
    Screen Shot 2020-01-31 at 10.44.53 AM.png
    10.4 KB · Views: 195
Physics news on Phys.org
You'll have to show us the work on your attempt if we're to be able to help you.
 
here's my attempt for the first (which was correct) and for the second (which was wrong)
 

Attachments

  • unnamed (1).jpg
    unnamed (1).jpg
    55.9 KB · Views: 187
Can you provide some details about where the numbers come from in your calculations?

What formula are you using for electric potential? The basic Coulomb's Law gives the force between charges, not the potential due to a charge.
 

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 'Voltmeter readings for this circuit with switches'

Thread 'Voltmeter readings for this circuit with switches'

TL;DR Summary: I would like to know the voltmeter readings on the two resistors separately in the picture in the following cases , When one of the keys is closed When both of them are opened (Knowing that the battery has negligible internal resistance) My thoughts for the first case , one of them must be 12 volt while the other is 0 The second case we'll I think both voltmeter readings should be 12 volt since they are both parallel to the battery and they involve the key within what the...
View full post »
Thread 'Trying to understand the logic behind adding vectors with an angle between them'

Thread 'Trying to understand the logic behind adding vectors with an angle between them'

My initial calculation was to subtract V1 from V2 to show that from the perspective of the second aircraft the first one is -300km/h. So i checked with ChatGPT and it said I cant just subtract them because I have an angle between them. So I dont understand the reasoning of it. Like why should a velocity be dependent on an angle? I was thinking about how it would look like if the planes where parallel to each other, and then how it look like if one is turning away and I dont see it. Since...
View full post »

Similar threads

The sign of the change in potential
Replies
7
Views
504
Electric Potential Energy of Point Charge Systems
Replies
2
Views
956
Why does electric potential energy increase if you move against the field?
Replies
6
Views
1K
The electric potential inside a conducting sphere with charge Q
Replies
11
Views
2K
Why Is the Electric Potential the Same for Inner and Outer Semi-Circles?
Replies
7
Views
1K
Earthing of two parallel conducting plates
Replies
11
Views
1K
Capacitors, equipotentials, and electric fields
Replies
5
Views
960
Potential and Electric Field near a Charged CD Disk
Replies
2
Views
2K
Find the electric field of a long line charge at a radial distance
Replies
1
Views
2K
What is taken as datum level for the following absolute potentials?
Replies
2
Views
570

Hot Threads

Recent Insights

Back
Top