What is the total electric flux due to these two point charges through a spheric

Question

What is the total electric flux due to these two point charges through a spherical surface centered at the origin and with radius r_1 = 0.385 m ? What is the total electric flux due to these two point charges through a spherical surface centered at the origin and with radius r_2 = 1.40 m ? A point charge q_1 = 3.80 nC is located on the x-axis at x = 2.15 m, and a second point charge q_2 = -6.85 nC is on the y-axis at y = 1.10 m. What is the total electric flux due to these two point charges through a spherical surface centered at the origin and with radius r_3 = 3.00 m ?

Explanation / Answer

= Q /0
1) No charge is enclosed. = 0

2) Charge enclosed = -6.85 nC
= Q /0 = -6.85 x 10^-9 / 8.854 x 10^-12
= - 773.66 Cm/F
Negative sign indicate flux enters the surface.

3) Charge enclosed = [3.80 -6.85] nC

= Q /0 = - 3.05 x 10^-9 / 8.854 x 10^-12
= -344.47 Cm/F

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