35. mmh A uniform electric field exists everywhere in the x, y plane. This electric field has a magnitude of 4500 N/C and is directed in the positive x direction. A point charge -8.0 x 10-9 C is placed at the origin.  Determine the magnitude of the net electric field at (a) x = -0.15 m, (b) x = +0.15 m, and (c) y = +0.15 m.

The net electric field is the vector sum of the electric field external and the electric field created by the charge at the origin.

 

(a) (-0.15m, 0)

 

 

 

 direction is due to charge at origin q0 is negative

 

 

 

(b) (0.15m, 0)

 

 

 

 direction is due to charge at origin q0 is negative

 

 

 

 

(c) (0, 0.15m)

 

 

 

 direction is due to charge at origin q0 is negative

 

 

This time we need to use Pythagorean theorem.

 

 

 

 

 

 

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