Work Done by moving point charge

AI Thread Summary
The discussion revolves around calculating the work required to bring a charge of +5q from infinity to a specific position near two fixed charges, +4q and -2q. The initial calculation resulted in a potential of 0 volts, leading to a work value of 0 joules, which raises doubts about its correctness. Participants emphasize the need for a detailed description of the charge positions and their relative spacings to accurately determine the net forces involved. Clarification on the coordinate system and the configuration of the charges is deemed essential for solving the problem. The conversation highlights the importance of understanding electric potential and the forces acting on the charges.
DANIELLYMA
Messages
16
Reaction score
0
Hi I think I figured it but I'm not sure.

Here's the problem:

How Much Work In Fig. 25-34, how much work is required to bring the charge of +5q in from infinity along the dashed line and place it as shown near the two fixed charges +4q and –2q? Take distance d = 1.40 cm and charge q = 1.6 × 10–19 C.

2md2p87.gif
I summed up the Vpotential at the point which I got 0 Volts

Then I used W = qt(Vp-Vinfinity) = 0J. It just seems too simple to be correct.
 
Last edited:
Physics news on Phys.org
You image does not open. Can you describe it?
 
This can't be solved without knowing the relative spacings of all the charges. The net repulsion/attraction will determine how much potential energy is stored by the work. Can you describe the particle positions using a coordinate system?
 
Edit: I reuploaded the picture, thanks for your replies
 

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 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »

Similar threads

Work done to insert a point charge 𝑞 at the center of a conducting sphere
Replies
12
Views
1K
Some confusion about work done to separate charges
Replies
11
Views
2K
Find the amount of work to move a particle from point A to B
Replies
4
Views
2K
Why is the work done in moving a charge around a circular path zero?
Replies
1
Views
1K
Work done in assembling a system of charges
Replies
1
Views
3K
Work done by moving a point charge
Replies
7
Views
3K
Calculating the work done using a line integral
Replies
6
Views
3K
Uniform distribution of charge and work needed
Replies
12
Views
3K
Work done by moving a point-charge
Replies
8
Views
3K
Work done moving charge near a line of charge
Replies
2
Views
2K

Hot Threads

Recent Insights

Back
Top