Electric field strength between charged plates

1. Jul 31, 2017

Cici2017

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution
E=kq/r2
so when the distance increase E should decrease?
I know this is wrong, but can someone explain why? Thanks

2. Jul 31, 2017

haruspex

Have you tried sketching the field lines?

3. Jul 31, 2017

Cici2017

field lines are from + to negative. vertical.

4. Jul 31, 2017

willem2

The field strength is equal to the density of the field lines, what can you say about that if all the field lines are vertical?

5. Aug 1, 2017

rude man

Have you covered gaussian surfaces in electrostatics yet?

6. Aug 1, 2017

Dadface

Cici the field at any point depends, amongst other things, on the geometry of the system. The equation you used gives the field due to an isolated point charge. And yes,this particular field does weaken with distance. The field for other geometries is different so for your parallel plates take the advice given above.

7. Aug 1, 2017

Cici2017

I think I have got it. Thank you!

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