Jack touches a negatively charged plastic rod to a metal sphere. How will the negative charges spread throughout the sphere?

Question

options:

They stay on the bottom.
They stay on the bottom.

They spread out evenly.
They spread out evenly.

They stay on the top.
They stay on the top.

They spread out unevenly.

Answer 1

When a negatively charged plastic rod touches a metal sphere, the negative charges (electrons) from the rod will transfer to the metal sphere. Since like charges repel and opposite charges attract, the excess negative charge will distribute itself across the surface of the sphere to minimize repulsion between the electrons.

In the case of a conducting sphere, the negative charges will spread out evenly across the sphere's surface, as charges in a conductor always seek to reach equilibrium and will move until they are evenly distributed.

Therefore, the correct answer is:

They spread out evenly.

Answer 2

There are different methods to electrically charge an object. Which method involves charging a conductor by bringing it near another charged object without the objects touching.

options:

conduction
conduction

friction
friction

neutralization
neutralization

Induction

Answer 3

The method of charging a conductor by bringing it near another charged object without the objects touching is called Induction.

In this process, the presence of the charged object causes a redistribution of charges within the conductor, leading to a separation of charges. If the conductor is then grounded or connected to another object, the charges can move, resulting in the conductor becoming charged.

Therefore, the correct answer is:

Induction.