A.   The electric force acting on a point charge is proportional to the magnitude of the point charge. In a uniform electric field, the field lines are straight, parallel, and uniformly spaced. Electric field lines near positive point charges radiate outward.

B.   The electric field created by a point charge is constant throughout space. Electric field lines near negative point charges circle clockwise.

C.   Electric field lines near positive point charges radiate outward. The electric field created by a point charge is constant throughout space. Electric field lines near negative point charges circle clockwise.

D.   The electric field created by a point charge is constant throughout space. Electric field lines near negative point charges circle clockwise. In a uniform electric field, the field lines are straight, parallel, and uniformly spaced.

A.   Electric field lines point away from positive charges and toward negative charges. Electric field lines are close together in regions of space where the magnitude the electric field is weak and are father apart where it is strong. Electric field lines are continuous; they do not have a beginning or an ending.

B.   Electric field lines can never intersect. At every point in space, the electric field vector at that point is tangent to the electric field line through that point. Electric field lines point away from positive charges and toward negative charges.

C.   Electric field lines are close together in regions of space where the magnitude the electric field is weak and are father apart where it is strong. Electric field lines are continuous; they do not have a beginning or an ending.

D.   Electric field lines are close together in regions of space where the magnitude the electric field is weak and are father apart where it is strong. Electric field lines can never intersect. Electric field lines are continuous; they do not have a beginning or an ending.

A.   At twice the distance, the strength of the field is 4E.

B.   At twice the distance, the strength of the field remains equal to E.

C.   At twice the distance, the strength of the field is E/4.

D.   At twice the distance, the strength of the field is 2E.

E.   At twice the distance, the strength of the field is E/2.

A.   Yes, regardless of the magnitude of the two charges.

B.   This cannot be determined without knowing the separation between the two charges.

C.   No, a zero electric field cannot exist between the two charges.

D.   Yes, but only if the two charges are equal in magnitude.

A.   The magnitude of the net electric field at the center of the square is 6 N/C.

B.   The magnitude of the net electric field at the center of the square is 0 N/C.

C.   The magnitude of the net electric field at the center of the square is 2 N/C.

D.   The magnitude of the net electric field at the center of the square is 4 N/C.

E.   The magnitude of the net electric field at the center of the square is 8 N/C.

A.   The interior field points in a direction opposite to the exterior field.

B.   There is no electric field on the interior of the conducting sphere.

C.   The interior field points in a direction parallel to the exterior field.

D.   The interior field points in a direction perpendicular to the exterior field.

A.   The net charge uniformly distributes itself on the sphere's inner surface.

B.   The net charge uniformly distributes itself on the sphere's inner and outer surfaces.

C.   The net charge clumps together at some location within the sphere.

D.   The net charge uniformly distributes itself on the sphere's outer surface.

E.   The net charge uniformly distributes itself throughout the thickness of the conducting sphere.