Electric field due to point charge

  • Thread starter th3plan
  • Start date
  • #1
92
0

Homework Statement



Two particles are fixed to an x axis: particle 1 charge -2.00x10^-7 at x=6.0cm and particle 2 at 2.00x10^-7 C at x=21.0cm. Midway between the particles, what is there net electric field?

Homework Equations



E=kq/r^2


The Attempt at a Solution



Ok so I drew the picture out, and i know q1 is negative so the electrive field is going towards it to the left, and q2 is + so that means the field is going to the left toward q1, so that means Enet= -E1-E2 , and its negative because there both going to the left? Am i correct on this ? I know the rest of problem is just plugging in numbers, but whant to make sure im correct on theory. Also lets say that q1 was postive does that mean q1 would go to the left, and q2 field would go to the right, resulting in a zero net force ?
 

Answers and Replies

  • #2
LowlyPion
Homework Helper
3,090
4

Homework Statement



Two particles are fixed to an x axis: particle 1 charge -2.00x10^-7 at x=6.0cm and particle 2 at 2.00x10^-7 C at x=21.0cm. Midway between the particles, what is there net electric field?

Homework Equations



E=kq/r^2


The Attempt at a Solution



Ok so I drew the picture out, and i know q1 is negative so the electrive field is going towards it to the left, and q2 is + so that means the field is going to the left toward q1, so that means Enet= -E1-E2 , and its negative because there both going to the left? Am i correct on this ? I know the rest of problem is just plugging in numbers, but whant to make sure im correct on theory. Also lets say that q1 was postive does that mean q1 would go to the left, and q2 field would go to the right, resulting in a zero net force ?
I'd say you have grasped the concepts. The E field of 0 in your follow up is however only at the mid point which I'm sure you already understand.
 

Related Threads on Electric field due to point charge

  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
1
Views
15K
  • Last Post
Replies
5
Views
1K
Replies
14
Views
2K
  • Last Post
Replies
2
Views
865
Replies
2
Views
2K
Replies
8
Views
58K
Replies
1
Views
6K
Replies
5
Views
3K
Replies
1
Views
957
Top