A square metal plate of area L2 cm with charge +Q is situated a distance d from

Question

A square metal plate of area L2 cm with charge +Q is situated a distance d from a plastic plate (polarizability ). You are able to measure a small attractive force between the metal plate and the plastic plate. Which one of the following statements is definitely true? a. The plastic plate has a net negative charge on its surface. b. The plastic plate has a net positive charge on its surface. c. No conclusive statement regarding the net charge of the plastic plate can be made with the given information. d. The plastic plate has no net charge on its surface.

Explanation / Answer

b. The plastic plate has a net positive charge on its surface.

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