Question
1.16: What is the net flux of
the uniform electric field of Exercise 1.15 through a cube of side 20 cm
oriented so that its faces are parallel to the coordinate planes?
Answer:
Solution -1
All the faces of a cube
are parallel to the coordinate axes. Therefore, the number of field lines
entering the cube is equal to the number of field lines piercing out of the
cube. As a result, net flux through the cube is zero.
Solution -2
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