Angle made by electric field lines

[bismita sahu]

Homework Statement

an electric field line emerges from a positive point charge +q1 at an angle x to the straight line joining it to a negative charge -q2.at what angle y will the field line enter the charge -q2?

Homework Equations

The Attempt at a Solution

sin(y/2)=sin(x/2)(q1/q2)^1/2

 

[Delphi51]

Sorry, I was assuming q1 and q2 are equal, in which case the answer is obvious from symmetry. But it appears that that are NOT equal and I don't know how to deal with that.

 

[mahdinanaz]

Hi guys,
I have the same problem, please give me hints for solving the question, tnx a lot