Charges q and Q are placed on the x axis at x = 0 and x = 2.0m, respectively. If q= -40 pC and Q =+30 pC, determine the net flux through a spherical surface (radius = 1.0 m) centered on the origin.

Explanation:

Charge q  will remain inside the given sphere and charge Q will remain outside it.

So charge inside sphere = - 40 x 10⁻¹² C

According to Gauss's law

Net flux over the spherical closed surface

= charge inside the surface / ε₀

= - 40 x 10⁻¹²  / 8.85  x 10⁻¹²

= - 4.52 Weber.

- ve sign indicates , flux is oriented towards the center.

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