AP Physics 1: Charges & Charging Methods

The gravitational force be ignored when dealing with atomic size particles because

• gravity is many orders of magnitude greater than the electric force.

• gravity is many orders of magnitude smaller than the electric force.

• there is no gravitational attraction between atomic masses.

Which net charge could be found on an object?

• 4.8 x 10^-19 C
• 1.8 x 10^-19 C
• 3.0 x 10^-19 C
• 2.8 x 10^-19 C

How do you make a substance negative?

• add electrons
• subtract electrons
• add protons
• subtract neutrons

A glass rod becomes positively charged when it is rubbed with silk. This net positive charge accumulates because the glass rod

• gains electrons
• loses electrons
• gains protons
• loses protons

After you rub a balloon on your sweater, the sweater will ______.

• be attracted to the balloon.

• be repelled by balloon

• have no interaction with the balloon

• Not enough information is given to determine what will happen

Now you rub two balloons on your sweater. Afterwards, the balloons are __________.

• attracted to each other.

• repelled apart.

• have no interaction.

• Not enough information is given to determine what will happen.

Which of the following will attract a neutral object?

• positively charged object

• neutral object

• negatively charged object

• either a positively or negatively charged object

When touching a Van de Graaff generator, your hair ______.

• becomes the same sign charge as the VDG

• becomes the opposite sign charge to the VDG

• becomes neutrally charged

• depends on the type of generator

Which picture shows a neutral, unpolarized electroscope?

• A

• C

• D

• E

A negatively charged rod touches a neutral, conducting sphere. What will happen?

• Electrons move from the insulating stand into the sphere.

• Protons move from the bar into the sphere.

• Electrons move from the charged metal bar into the sphere.

• Protons move from the sphere into the negatively charged bar.