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  • A rectangle of cross sectional area is placed in a uniform electric field. The normal to the area of

A rectangle of cross sectional area \mathrm{A} is placed in a uniform electric field. The normal to the area of the coil makes an angle of \mathrm{90^{\circ}} with the electric field. The electric flunk \mathrm{\phi} through the rectangle is-

Option: 1

\mathrm{\vec{E}}


Option: 2

\mathrm{\vec{A} \cdot \vec{E}}


Option: 3

\mathrm{\frac{\vec{A} \cdot \vec{E}}{\sqrt{2}}}


Option: 4

Zero


Answers (1)

best_answer

For a rectangle of cross sectional area \mathrm{A} is placed in a uniform electric field and the normal to the area of the coil makes an angle of \mathrm{90^{\circ}} with the electric field.
Electric flux 
                  \mathrm{\begin{aligned} \phi & =\int \vec{E} \cdot d \vec{s} \\ & =\int E d s \cos 90^{\circ} \\ & =\int E d s x_0=0 \end{aligned}}

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