Q.

What is the net flux of the uniform electric field E which is in positive x-direction through a cube of side 20 cm oriented so that its faces are parallel to the coordinate planes?

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a

20E

b

0

c

400E

d

10E

answer is D.

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The number of lines entering the cube is the same as the number of lines leaving the cube.

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What is the net flux of the uniform electric field E→ which is in positive x-direction through a cube of side 20 cm oriented so that its faces are parallel to the coordinate planes?