# Electric flux through a surface

## Homework Statement

Find the electric flux through the plane surface shown in the figure below if θ = 64.2°, E = 375 N/C, and d = 4.70 cm. The electric field is uniform over the entire area of the surface.

## The Attempt at a Solution

By using the equation:EAcosθ
375x0.0472cos64.2=0.167
I've found that answer is 0.167N.m2/C,but it is not correct.

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Last edited:

jtbell
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I'v edited the content of my thread.Tell me of there are any things are need to be added.

I'v edited the content of my thread.Tell me of there are any things are need to be added.

You have done the calculations incorrectly, what did you input in your calculator?

You have done the calculations incorrectly, what did you input in your calculator?

375x0.0472cos64.2=0.167

375x0.0472cos64.2=0.167

I don't seem to be getting 0.167 with Wolfram Alpha.

1 person
I don't seem to be getting 0.167 with Wolfram Alpha.

But I cannot get he other answer.

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E=375
d2 = .002209
Cos64.2° = .435231

Multiply the three quantities and you should get something like .3605

1 person
But I cannot get he other answer.

because the tool is interpreting the angle 64.2 in radians .

E=375
d2 = .002209
Cos64.2° = .435231

Multiply the three quantities and you should get something like .3605

Thanks. I finally found that I have changed the mode of my calculator into radian,so I cannot find the correct answer.