Electrostatics

When an object gains a charge, it is due to the movement of what subatomic particles?

• protons

• electrons

• neutrons

• protons and electrons

Referring to the balloon and sweater simulation you worked on, as the balloon gained a negative charge, what happened to the total charge of the balloon sweater system?

• it became more positive

• it became more negative

• it stayed the same

Like charges ___________________ and unlike charges ____________.

Materials that allow electrons to flow freely across the entire surface are known as __________________.

• conductors

• insulators

Insulators prevent charges from moving across surfaces because ____________________.

• the electrons move too fast

• the protons move away from the electrons

• the electrons are held tightly in one location

• insulators cannot hold a charge at all

What object allowed John Tra"voltage" to discharge his electrons?

• The rug
• The wall
• The door
• The metal doorknob

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

When a balloon is rubbed on a sweater in what direction do the electrons move?

• From the sweater to the balloon
• From the balloon to the sweater
• They do not move
• They travel to the groud

Tags

NGSS.HS-PS3-5

During a physics lab, a plastic strip was rubbed with cotton and became positively charged. The correct explanation for why the plastic strip becomes positively charged is that ...

• the plastic strip acquired extra protons from the cotton.
  
• the plastic strip acquired extra protons from the charging process 
• protons were created as the result of the charging process
  
• the plastic strip lost electrons to the cotton during the charging process 

What do you call the process of charging a conductor by bringing it near another charged object?

• induction
• polarization
• neutralization
• conduction

Tags

NGSS.HS-PS2-4

What is the end result of charging by friction?

• Both object have the same charge, so they will attract one another

• Both object have the same charge, so they will repel one another

• Both object have the opposite charge, so they will attract one another

• Both object have the opposite charge, so they will repel one another

Tags

NGSS.HS-PS2-4