Electrostatics Chapter 32/33

What direction are the electric field lines around an electron?

• towards the charge
• away from the charge

What does it mean when the electric field lines are close together?

• the field is positive
• the field is negative
• The field is strong
• the field is weak

The electrostatic force between two charges located 2 meters apart is 0.10 N.  What will the force be between these charges when they are located 1 meter apart?

• 0.40 N
• 0.20 N
• 0.10 N
• 0.05 N

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

• Induction
• ESD
• Conduction
• Conducting path

The electrical force between two objects is 144 N. If the charge on BOTH of the objects is doubled AND the distance between them is tripled, the force between them will be:

• 96 N

• 32 N

• 64 N

• 192 N

An object with a charge of 8.1*10^-4 C creates an electric field A test charge of +1.2*10^-6 C experiences a force of 0.20 N. Calculate the electric field strength.

• 0.00405 N/C

• 246.9 N/C

• 1.6*10⁵ N/C

• 1.35*10¹⁰ N/C

Consider the conduction charging shown. 

• 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.

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

Two like charges

•  neutralize each other.
• repel each other. 
• must be neutrons. 
• attract each other.

Where do electrons go when you rub a balloon on your hair?

• Onto the balloon
• Into your hair
• Nowhere