A charge of +2 C is at the origin. When charge Q is placed at 2 m ...

[student77]

A charge of +2 C is at the origin. When charge Q is placed at 2 m along the positive x axis, the electric field at 2 m along the negative x axis becomes zero. What is the value of Q?
   

   
  a.
  3 C
   
  b.
  6 C
   
  c.
  7 C
   
  d.
  8 C

Question 2

Two charges, +Q and Q, are located two meters apart and there is a point along the line that is equidistant from the two charges as indicated. Which vector best represents the direction of the electric field at that point?
   

   
  a.
  Vector E_A
   
  b.
  Vector E_B
   
  c.
  Vector E_C
   
  d.
  The electric field at that point is zero.

[sokh]

Answer to Question 1

d

Answer to Question 2

a

[student77]

Wow, this really help

[raili21]

Great answer, keep it coming