Question

What is the flux through the plane taken perpendicular to the field ?
please send me ans i have exam​

Answer 1

Answer:

The magnetic flux through a unit area perpendicular to the field is Magnetic Flux Density. - It is defined as the amount of magnetic flux passing through per unit area of a section which is perpendicular to the direction of field.

Explanation:

If the surface is perpendicular to the field (left panel), and the field vector is thus parallel to the vector, →A, then the flux through that surface is maximal. If the surface is parallel to the field (right panel), then no field lines cross that surface, and the flux through that surface is zero.

Answer 2

Answer:

zero

Explanation:

Strategy Apply the definition of flux: $=\stackrel{\to }{\text{E}}\stackrel{\to }{\text{A}}\left(\text{uniform}\phantom{\rule{0.2em}{0ex}}\stackrel{\to }{\text{E}}\right)$, noting that a closed surface eliminates the ambiguity in the direction of the area vector.

Solution Through the top face of the cube, $={\stackrel{\to }{\text{E}}}_{0}\stackrel{\to }{\text{A}}={E}_{0}A$.

Through the bottom face of the cube, $={\stackrel{\to }{\text{E}}}_{0}\stackrel{\to }{\text{A}}={E}_{0}A$, because the area vector here points downward.

Along the other four sides, the direction of the area vector is perpendicular to the direction of the electric field. Therefore, the scalar product of the electric field with the area vector is zero, giving zero flux.

The net flux is ${\text{net}}={E}_{0}A-{E}_{0}A+0+0+0+0=0$.

Significance The net flux of a uniform electric field through a closed surface is zero.

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