An experiment consists of two positively charged spheres that are set apart at a fixed distance. How will the electrostatic force FE between the two spheres change if several drops of positively charged oil are added to one of the spheres?A.The FE acting on the sphere without the oil will increase, because the total charge on the sphere with oil has increased.B.The FE acting on the sphere without the oil will decrease, because the total charge of the sphere with oil has increased.C.The FE acting on the sphere without the oil will not change, because its charge is not changed.D.The FE acting on the sphere without the oil will not change, because the distance separation of each sphere is not changed.Submit
Question
An experiment consists of two positively charged spheres that are set apart at a fixed distance. How will the electrostatic force FE between the two spheres change if several drops of positively charged oil are added to one of the spheres?A.The FE acting on the sphere without the oil will increase, because the total charge on the sphere with oil has increased.B.The FE acting on the sphere without the oil will decrease, because the total charge of the sphere with oil has increased.C.The FE acting on the sphere without the oil will not change, because its charge is not changed.D.The FE acting on the sphere without the oil will not change, because the distance separation of each sphere is not changed.Submit
Solution
The correct answer is A. The FE acting on the sphere without the oil will increase, because the total charge on the sphere with oil has increased.
This is because the electrostatic force between two charged objects is directly proportional to the product of their charges and inversely proportional to the square of the distance between them (according to Coulomb's Law). Therefore, if the charge on one of the spheres increases (due to the addition of the positively charged oil), the electrostatic force between the two spheres will also increase, regardless of whether the charge on the other sphere or the distance between them changes.
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