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  2. AP Physics C E M
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Differentiate between calculating electric flux with a constant field and a varying field.

Constant Field: Use ΦE=E⃗cdotA⃗\Phi_{E} = \vec{E} cdot \vec{A}ΦE​=EcdotA. Varying Field: Use ΦE=∫E⃗cdotdA⃗\Phi_{E} = \int \vec{E} cdot d\vec{A}ΦE​=∫EcdotdA (integration required).

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Differentiate between calculating electric flux with a constant field and a varying field.

Constant Field: Use ΦE=E⃗cdotA⃗\Phi_{E} = \vec{E} cdot \vec{A}ΦE​=EcdotA. Varying Field: Use ΦE=∫E⃗cdotdA⃗\Phi_{E} = \int \vec{E} cdot d\vec{A}ΦE​=∫EcdotdA (integration required).

How do you calculate total electric flux when the electric field is not constant?

Use the integral formula: ΦE=∫E⃗cdotdA⃗\Phi_{E} = \int \vec{E} cdot d\vec{A}ΦE​=∫EcdotdA. Integrate the flux through infinitesimal area elements over the entire surface.

What are the steps to calculate electric flux with a constant electric field?

  1. Determine the electric field vector E⃗\vec{E}E. 2. Determine the area vector A⃗\vec{A}A. 3. Calculate the dot product: ΦE=E⃗cdotA⃗\Phi_{E} = \vec{E} cdot \vec{A}ΦE​=EcdotA.

What is the effect of increasing the electric field strength on electric flux?

The electric flux through the surface increases proportionally.

What happens if the angle between the electric field and the area vector is 90 degrees?

The electric flux through the surface is zero.

What is the effect of the electric field lines going out of the surface?

The flux is positive.

What is the effect of the electric field lines going in of the surface?

The flux is negative.