Problem: The figure shows three charges, q1; q2, and q3. S is a Gaussian surface with q1 inside. The other charges are not inside S. Consider Gauss' law and choose the true statement. [A] Charges q2; q3 and q4 outside the surface do not affect E on the surface. [B] ∮s E • n dA = q1 + q2 - q3 - q4 / ϵ0  [C] ∮s E • n dA = q1 + q2 + q3 + q4 / ϵ0  [D] ∮s E • n dA = q1 / ϵ0  [E] None of the above because the figure is not symmetrical.

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Problem Details

The figure shows three charges, q1q2, and q3. S is a Gaussian surface with q1 inside. The other charges are not inside S. Consider Gauss' law and choose the true statement.

[A] Charges q2; q3 and q4 outside the surface do not affect E on the surface.

[B] ∮s E • n dA = q1 + q2 - q3 - q4 / ϵ0 

[C] ∮s E • n dA = q1 + q2 + q3 + q4 / ϵ0 

[D] ∮s E • n dA = q1 / ϵ0 

[E] None of the above because the figure is not symmetrical.

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