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# A physics question

Registered User Posts: 17 New Member
edited October 2012
Post edited by cobalt60 on

## Replies to: A physics question

• Registered User Posts: 24 New Member
Hi
By convention the direction of an electric field is in the direction AWAY from a positive charge (and TO a negative charge).

The electric field in P caused by +Q alone is E to the right (since +Q is positive).

when you add the -Q charge, you add an electric field equal in magnitude (E=KQ/r^2 - I guess you have to assume that P is exactly in the middle) in the direction TO it (the right side).

Summing it all up you get a 2E electric field to the right side