Calculate Charge from Electric Field Diagram?

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

The diagram shows the electric field lines surrounding three electric charges. Assume that q1 + q2 = -2.43 µC.

A) Calculate q2.

B) Calculate q1.

C) Calculate q3.

2. Relevant equations

|Fe|= (k*|q1|*|q2|)/r^2
|E|=(k*|Q|)/r^2

k = 8.99*10^9 (N*m^2)/C^2
Fe = Electrostatic force between a pair of charges
r = charge separation
q1, q2 = charge magnitudes
E = electric field
Q = charged object

3. The attempt at a solution
I am having a very hard time with this question. I’m not sure where to start. Based on the diagram I assume that q1 and q3 will be equal in charge and magnitude but am not sure where to go from here.

Any help would be greatly appreciated!

http://ift.tt/1eOsAIc

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