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AP Physics 2
10.3 Electric Fields
10.1 Electric Charge and Electric Force
AdvancedMCQConceptual14.3k
A positive point charge labeled +Q sits on the left. Radial electric field lines emanate outward from +Q, spreading apart as distance from +Q increases. To the right of +Q, two small elliptical molecules are shown in the field. One molecule represents a polar dielectric and the other represents a nonpolar dielectric. Both molecules are aligned horizontally with a negative charge labeled -q on their left side closer to +Q and a positive charge labeled +q on their right side farther from +Q. Leftward arrows labeled F_attract originate at -q, and shorter rightward arrows labeled F_repel originate at +q. No other labels, lines, text, or axes appear.
Neutral dielectric dipoles in the non-uniform field of a point charge +Q.
A sample of a neutral polar dielectric material and a sample of a neutral nonpolar dielectric material are placed in separate regions near a positively charged point source, where the electric field is non-uniform. Experimentally, both dielectric samples experience a net attractive force toward the point charge. Which of the following best explains why both neutral materials are attracted to the positively charged point source?

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