Sphere \displaystyle {X}X of radius \displaystyle {R}R has a charge of \displaystyle +{Q}+Q, and identical sphere \displaystyle {Y}Y has a charge of \displaystyle −{Q} a
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ˆ’Q. The spheres are held with their centers separated by a distance of \displaystyle {10}{R}10R, as shown in the figure.
Several water droplets are released near each sphere, and a student observes that the spheres attract some of the droplets. The student claims that the droplets become polarized by each sphere, causing some to be positively charged and some to be negatively charged. Which of the following represents a correct claim and its justification?
No, because polarization of an object does not give it a net charge.
No, because water is an insulator and insulators cannot be charged.
No, because water is an insulator and insulators cannot be polarized.
Yes, because objects must have net charges of opposite sign to attract each other.