Two charges of 15 pC and -40 pC are inside a cube with sides that ...

[waynest]

Two charges of 15 pC and -40 pC are inside a cube with sides that are of 0.40-m length. Determine the net electric flux through the surface of the cube.
 a. +2.8 N  m2/C
  b. -1.1 N  m2/C
  c. +1.1 N  m2/C
  d. -2.8 N  m2/C
  e. -0.47 N  m2/C

Question 2

Suppose a uniform electric field of 4 N/C is in the positive x direction. When a charge is placed at and fixed to the origin, the resulting electric field on the x axis at x = 2 m becomes zero. What is the magnitude of the electric field at x = 4 m on the x axis at this time?
 a. 0
  b. 1 N/C
  c. 2 N/C
  d. 4 N/C
  e. More information is needed to find the resulting field magnitude at this position.

[moormoney]

Answer to Question 1

D

Answer to Question 2

C