Coulomb's law take II

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

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

What variable is a Coulomb the unit for?

• Charge
• Force
• Distance
• Mass

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

If the distance doubles, what happens to the force?

• Reduced by half
• Reduced by 1/4
• Stays the same
• Quadruples

Electrostatic force F is directly proportional to:

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

The graph shows the relationship between the force of interaction and the magnitude of charge. What type of relationship is this?

• Direct

• Indirect

• Inverse

• Reverse

How do electrons differ from protons?

• They are the same thing
• Electrons hold a negative charge and protons hold a positive charge.
• Electrons are positively charged and protons are negatively charged.
• Protons are neutral 

The image shows two charged particles with a force of 2.4 N. What would you predict the force of interaction would be when the magnitude of charge on q2 doubles?

• 9.6 N

• 4.8 N

• 1.2 N

• .6 N