Solve Electric Potential - Find Charge (9e-05 J)

AI Thread Summary
The problem involves calculating the charge when moving it from a potential of 284 V to 83 V, requiring 9e-05 J of work. The formula used is Uel = qV, leading to the rearrangement q = Uel/V. The calculation yields q = 9e-05 / (284 - 83), resulting in approximately 4.478 x 10^-7 C. Since positive work is needed to move the charge from a higher to a lower potential, it indicates that the charge is negative. The conclusion is that the charge value is approximately -4.478 x 10^-7 C.
BuBbLeS01
Messages
602
Reaction score
0

Homework Statement


Moving a charge from point A, where the potential is 284 V, to point B, where the potential is 83 V, takes 9e-05 J of work. What is the value of the charge?


Homework Equations





The Attempt at a Solution


I know this is a very easy problem but I am not getting the right answer...
I thought it was just...
Uel = qV
q = Uel/V
q = 9x10^-5 / (284-83) = 4.478 x 10^-7 C
 
Physics news on Phys.org
If it takes positive work to move the charge from high potential to low potential, then the charge must be negative.
 

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

MIT OCW, 8.02 Electromagnetism: Potential for an Electric Dipole
Replies
1
Views
2K
Ion moving through electric potential difference and magnetic field
Replies
8
Views
1K
What is taken as datum level for the following absolute potentials?
Replies
2
Views
561
Electric potential of nested spherical shells
Replies
4
Views
871
Why Is Work Positive When Done Against the Electric Field?
Replies
22
Views
3K
Find the electric field between 2 finite discs
Replies
16
Views
1K
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
Van der Graaf Generator: Charge, Potential and Redesign Questions
Replies
8
Views
2K
Uniform charge density and electric potential
Replies
4
Views
3K

Hot Threads

Recent Insights

Back
Top