We want to investigate if charged objects interact with neutral objets. If they

Question

We want to investigate if charged objects interact with neutral objets. If they do, we want to investigate the interaction between them. Design and conduct experiments to examine how a neutral (un-rubbed) plastic rod and a neutral (un-rubbed) metal rod interact with rubber/charged objects. Does it matter if the charged object is positively or negatively charged? Available equipment: plastic rods, last rod, a swivel or hanger, rubbing materials (dry paper towel and rabbit fur).

a) Clearly describe your experiment including diagrams

b) Devise an explanation for how the interaction between the rubbed/charged rod and the un-rubbed rod (plastic or metal) works. Remember, there is NO CONTACT between the objects. Hint: Think about the internal microscopic structure of the rod. Come up with two competing ideas about the internal structure of materials that could explain why uncharged objects are attracted to charged objects.Use charged diagrams to illustrate your explanation.

Explanation / Answer

a.)The metal rod are supported by insulating stands so that any charge acquired by the rod cannot travel to the ground. Being made of metal (a conductor), electrons are free to move between the rod - from rod A to rod B and vice versa. If a rubber balloon is charged negatively (perhaps by rubbing it with animal fur) and brought near the rod, electrons within the two-rod system will be induced to move away from the balloon. This is simply the principle that like charges repel. Being charged negatively, the electrons are repelled by the negatively charged balloon. And being present in a conductor, they are free to move about the surface of the conductor. Subsequently, there is a mass migration of electrons from rod A to sphere B. This electron migration causes the two-rod system to be polarized . Overall, the two-rod system is electrically neutral. Yet the movement of electrons out of rod A and into sphere B separates the negative charge from the positive charge. Looking at the rod individually, it would be accurate to say that rod A has an overall positive charge and sphere B has an overall negative charge. Once the two-rod system is polarized, sphere B is physically separated from sphere A using the insulating stand. Having been pulled further from the balloon, the negative charge likely redistributes itself uniformly about rod . Meanwhile, the excess positive charge on rod A remains located near the negatively charged balloon, consistent with the principle that opposite charges attract. As the balloon is pulled away, there is a uniform distribution of charge about the surface of both rod. This distribution occurs as the remaining electrons in rod A move across the surface of the rod until the excess positive charge is uniformly distributed.

b.)due to induction process when we brougt negatively charged rubber rod to the netural metal rod the positive charge of the metal rod collect at the front of rubber rod and negative charge on the rare side of the metal rod so that metal rod will be attracted towards rubber rod.

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.