Physics Final Exam Semester 2

When an object gains electrons it becomes __________

• Neutral

• Positively charged

• Negatively charged

After a balloon is rubbed against wool, the two objects will ________ each other because they have ___________ charges

• attract; like

• attract, opposite

• repel; like

• repel; opposite

Which statement is true of a positively charged object?

• Positively charged objects do not contain any electrons.

• Positively charged objects do not contain neutrons or electrons.

• There is a lack of electrons on a positively charged object.

• The protons and the electrons are both positively charged on such objects.

When distance increases, electrostatic force ____________; we call this relationship ____________ proportional

• decreases;directly
• decreases;inversely
• increases;inversely
• increases;directly

What happens to the force between two charged objects when you double the distance between them?

• 2X
• 1/2X
• 4X
• 1/4X

What happens to the force between two charged objects if you double the distance between them and double the magnitude of one charge?

• 4X
• 6X
• 1/2X
• 1/6X

If each of the charges doubles, what happens to the force?

• Quadruples
• Doubles
• Stays the same
• Reduced by half

Electrostatic force F is directly proportional to:

• r^2 (distance squared)
• q1
• q2
• both q1 and q2

A balloon is rubbed against a student's hair and then touched to a wall. The balloon sticks to the wall due to

• The balloon is charged neutral, so is the wall, so it attracts to the wall

• The balloon is charged opposite the wall, so it attracts to the wall

• The balloon has a charge, so it attracts the neutral wall

• The wall grounds the balloon, so it sticks

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

• induction
• polarization
• neutralization
• conduction