Electric Charge and Electric Fields

What causes two balloons that have been rubbed on hair to push each other away?

• They are both positively charged.

  
  

• They are both neutrally charged.

  
  

• They are both negatively charged.

  
  

• They contain no charge.

  
  

Which subatomic particle is considered the essence of electricity due to its easy transferability?

• Proton

• Neutron

• Electron

• Quark

What term describes a substance that can easily transfer electric charge?

• Insulator

• Conductor

• Semiconductor

• Dielectric

What is a key difference between electric force and gravitational force?

• Electric force is always attractive, while gravitational force can be attractive or repulsive.

• Electric force is always repulsive, while gravitational force is always attractive.

• Electric force can be attractive or repulsive, while gravitational force is always attractive.

• Electric force is generally much weaker than gravitational force.

What is a true statement about electric field lines?

• They cross each other.

  
  

• They point towards negative charges.

  
  

• They point towards positive charges.

  
  

• They indicate the velocity of charges.

  
  

What is the relationship between the strength of an electric field and the density of field lines?

• More densely packed field lines indicate greater field strength.

  
  

• Less densely packed field lines indicate greater field strength.

  
  

• Density of field lines is unrelated to field strength.

  
  

• Field strength decreases with denser field lines.