Electrostatics

When you brush your hair you scrape off electrons, and your hair

• becomes positively charged
• becomes negatively charged
• becomes positively and negatively charged
• remains uncharged, or neutral

As a pair of charges is brought close together, the force between them

• Increases
• Decreases
• Increases only if they are the same sign
• Increases only if they are the opposite sign

Gravitational force depends on mass.  What comparable quantity governs the electrical force?

• Volume
• Density
• Charge
• Charge density

Which has more charge?

• Proton

• Electron

• Neither

What method of charging is depicted here?

• Induction
• Conduction
• Reduction
• Friction

What is it called when an object gains a charge when touched by a charged object?

• Induction
• ESD
• Conduction
• Conducting path

When a plastic rod is rubbed with wool, the wool acquires a positive charge because

• protons are transferred from the wool to the rod
• protons are transferred from the rod to the wool
• electrons are transferred from the rod to the wool
• electrons are transferred from the wool to the rod

If a negative rod is brought near a neutral electroscope, how will the electrons on the electroscope move?

• Toward the rod
• Away from the rod
• Onto the rod
• Away from the leaves

If a positively charged rod is brought near a neutral pith ball, what will the pith ball do?

• Move away from the rod
• Move toward the rod
• Do nothing
• Disappear 

Which method of charging an object leaves both objects with the same charge?

• Friction
• Conduction
• Induction
• Electroscope