Question

Two point charges are fixed in place along the x axis as shown in the figure above. The charge Q₁=-3 μμC is located at the origin. The charge Q₂=4 μμC is a distance a = 0.46 m to the right of the origin.

1)

Calculate the x component of the electric field at point P a distance h=0.32 m above the origin.

E_x = -0.115 × 10⁶ N/C

E_x = -0.094 × 10⁶ N/C

E_x = 0.264 × 10⁶ N/C

E_x = -0.149 × 10⁶ N/C

E_x = -0.379 × 10⁶ N/C

2)

Calculate the magnitude of the electric field at point P a distance h=0.32 m above the origin.

|E| = 0.115 × 10⁶ N/C

|E| = 0.264 × 10⁶ N/C

|E| = 0.149 × 10⁶ N/C

|E| = 0.379 × 10⁶ N/C

|E| = 0.219 × 10⁶ N/C

3)

In which region along the x axis is there a point where the electric field due to the two charges is zero?

-∞∞ < x < 0

0 < x < a

a < x < ∞∞

4)

Two point charges are fixed in place along the x axis as shown in the figure above. The charge Q₁=-3 μμC is located at the origin. The charge Q₂=4 μμC is a distance a = 0.46 m to the right of the origin. Calculate the electric potential at point P a distance h=0.32 m above the origin, given the electric potential at infinity is defined to be zero.

V = -0.084 × 10⁶ J/C

V = -0.02 × 10⁶ J/C

V = 0.064 × 10⁶ J/C

V = 0.149 × 10⁶ J/C

V = -0.006 × 10⁶ J/C

5)

A third charge Q₃=2 μμC is placed at point P. What is the total work done by the electric field when these three charges are moved from infinitely far apart, to this final configuration.

W_E = -0.28 J

W_E = -0.53 J

W_E = 0.28 J

W_E = 0.53 J

W_E = 0 J

Answer 1