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A flat piece of cardboard with area 76.0 cm2 is immersed in a uniform electric field...

A flat piece of cardboard with area 76.0 cm2 is immersed in a uniform electric field of strength 9.80×103 N/C. If the angle between the field and the cardboard’s area vector is 129°, find the electric flux through the cardboard.
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Answer #1

The electric flux is given as

= EAcos

where is the angle between area vector and electric field

Note - Remember to convert area from cm2 to m2 .

so,

= 9.8e3 * 76e-4 * cos 129

= - 46.87 N/C*m2

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