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Question 19

A point charge of 2.0 μC is at the centre of a cubic Gaussian surface 9.0 cm on edge. What is the net electric flux through the surface?

Answer

Net electric flux (ΦNet) through the cubic surface is given by,

Where, ∈0 = Permittivity of free space

= 8.854 × 10−12 N−1C2 m−2

q = Net charge contained inside the cube = 2.0 μC = 2 × 10−6 C

= 2.26 × 105 N m2 C−1

The net electric flux through the surface is 2.26 ×105 N m2C−1.

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