How Do You Solve a Proton's Orbit and Electric Field Problems?

ELHEK
Messages
8
Reaction score
0
Hey ppl! anyone who can help me with this i will be so grateful! I've been stuck on it for 2 days(dumbarse ) thx!

1) A proton orbits a long chared wire, making 1.0x10^6 revolutions per second. The radius of the orbit is 1.0cm. What is the wire's linear charge density?

2) Show that the on axis electic field of a ring of charge has the expected behaviour when z<<R and when z>>R.

The answer to the first questions is -2.29nC/m, but I am clueless about how to go about it, I've also tried applying circular kinematics but have not been successful. The second question i am absolutly dumbfounded by. Thx again anyone who helps!
 
Physics news on Phys.org
1) How can you relate the linear charge density and the electric field generated by the wire? (hint: Gauss)

2) Do you know how to (at least in principle) determine the electric field on the axis? (hint: there's no shortcut here)
 
tis alright I've solved em both thanks anyway
 

Thread 'Initial conditions for orbits around a wormhole'

Hi, I had an exam and I completely messed up a problem. Especially one part which was necessary for the rest of the problem. Basically, I have a wormhole metric: $$(ds)^2 = -(dt)^2 + (dr)^2 + (r^2 + b^2)( (d\theta)^2 + sin^2 \theta (d\phi)^2 )$$ Where ##b=1## with an orbit only in the equatorial plane. We also know from the question that the orbit must satisfy this relationship: $$\varepsilon = \frac{1}{2} (\frac{dr}{d\tau})^2 + V_{eff}(r)$$ Ultimately, I was tasked to find the initial...
View full post »

Thread 'Help to convert units of a simple formula'

The value of H equals ## 10^{3}## in natural units, According to : https://en.wikipedia.org/wiki/Natural_units, ## t \sim 10^{-21} sec = 10^{21} Hz ##, and since ## \text{GeV} \sim 10^{24} \text{Hz } ##, ## GeV \sim 10^{24} \times 10^{-21} = 10^3 ## in natural units. So is this conversion correct? Also in the above formula, can I convert H to that natural units , since it’s a constant, while keeping k in Hz ?
View full post »

Similar threads

Dependence of an electric field on distance
Replies
12
Views
2K
B How is surface charge accumulated?
Replies
36
Views
6K
Two problems on Electric Fields and Electric Potential
Replies
7
Views
2K
Need help with electric field questions thx
Replies
2
Views
6K
Solve Numerical Problem: Proton Mass, Charge, Speed & Electric Field Strength
Replies
5
Views
2K
Calculating Electric Field Strength from a Charged Wire
Replies
1
Views
1K
How Do You Calculate the Electric Field Between a Wire and a Cylinder?
Replies
2
Views
2K
Finding Electric Field due to Sheet of Charge
Replies
1
Views
2K
How Do You Find the Electric Field for an Infinitely Long Charged Cylinder?
Replies
1
Views
2K
Why is the electric field in an ideal wire zero?
Replies
19
Views
5K

Hot Threads

Recent Insights

Back
Top