Electron Speed in Conducting Shells

[branshims]

Homework Statement

Two long conducting cylindrical shells are coaxial and have radii of 20 mm and 80 mm. The
electric potential of the inner conductor, with respect to the outer conductor, is +600 V. An
electron is released from rest at the surface of the outer conductor.
What is the speed of the electron as it reaches the inner conductor?

Homework Equations

Unsure. Maybe qV?

The Attempt at a Solution

I don't know where to start, honestly. The answer is 1.5*10^7m/s but I cannot figure the intermediate steps.

Edit: Solved, the formula was as follows,

v=sqrt(2*q*V/m)

 

[BvU]

Hello Bran, welcome to PF :)

Relevant equation "Maybe qV" is somewhat lacking: it doesn't have a speed in it, so there won't be a speed coming out. What's the dimension ?

From 3) I gather your attempt at solution was limited to peeking at the solutions manual (or at the back of the book). That doesn't count !

 

[branshims]

Hello Bran, welcome to PF :)

Relevant equation "Maybe qV" is somewhat lacking: it doesn't have a speed in it, so there won't be a speed coming out. What's the dimension ?

From 3) I gather your attempt at solution was limited to peeking at the solutions manual (or at the back of the book). That doesn't count !

I do not know what the point of your post is. Are you asking me anything?

 

[BvU]

Yes, you should show your attempt at solution. Otherwise PF rules don't allow assistance.

Fortunately, you found something other than just maybe qV and that was the right eqn, so: bravo !

 

[mcamila00]

hi, please someone can tell me how to do it. please, is urgent...

 

[BvU]

hi, please someone can tell me how to do it. please, is urgent...

A thread from 2014 urgent ? OP indicates it is solved.

and please read the guidelines

What is your question ?

 

[mcamila00]

A thread from 2014 urgent ? OP indicates it is solved.

and please read the guidelines

What is your question ?

How to solve it. He says the formula but I need the steps because I don’t understand

 

[BvU]

Post what you have so far ...

and please read the guidelines