Point Charge accelerated by charged ring

AI Thread Summary
A point charge Q is placed at the center of a charged ring, with one half charged 2Q and the other half 4Q. Upon release, the point charge accelerates indefinitely, raising the question of its ultimate speed. The discussion highlights confusion regarding the separation of the ring's charges and their influence on the point charge, noting that it is equidistant from all charges. To find the ultimate speed, the potential energy of the point charge in relation to the total charge (6Q) is considered, suggesting a relationship between potential energy and kinetic energy. The key takeaway is the need to calculate the total potential energy to determine the point charge's speed upon release.
riincanavi1
Messages
3
Reaction score
0
1. A point charge Q is held in the center of a charged ring. Half of the ring is charged
uniformly with charge 2Q and the other half with 4Q. When the point charge is released, it
accelerates toward infinitum. What is the ultimate speed of the point charge?



2. Homework Equations [E=F/q]



3. Don't know where to start. I know that there is a force applied to the charge, but the separation of the ring into halves is confusing me.
 
Physics news on Phys.org
The point charge is the same distance from all those charges.

The potential energy of a point charge q near another charge Q at distance r:-kqQ/r
 
"The point charge is the same distance from all those charges.

The potential energy of a point charge q near another charge Q at distance r:-kqQ/r "

So in other words I should add up the charges (6Q) and then find the potential energy. Then relate potential energy to kinetic?
 

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

Kinetic Energy of a Charged Particle near a Charged Ring
Replies
2
Views
1K
How Is the Electric Field Calculated for a Point Outside a Charged Ring?
Replies
11
Views
3K
How to Apply Derivatives in Physics Problems?
Replies
9
Views
1K
Point charge with very thin metal sheet along a spherical surface
Replies
21
Views
2K
Electric field created by point charges
Replies
6
Views
765
Tension developed in a charged ring
Replies
2
Views
2K
Force of one distribution of charge on another
Replies
9
Views
1K
Three charges constrained to a ring
Replies
4
Views
1K
Potential for a charged ring and point charge system
Replies
3
Views
2K
Force between charged particle and conducting cylinder
Replies
10
Views
909

Hot Threads

Recent Insights

Back
Top