Electrostatics

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

Which of the following labeled points is in the region with the strongest force of electric charge

• A
• B
• C
• D

2 charged objects both feel a force of 200 N. If q1 becomes 3 times bigger, what is the new force

• 203

• 600

• 66.7

• 1800

According to Coulomb's law, you can do all of the following to increase the electric force of repulsion EXCEPT

• Increase charge 1
• Increase charge 2
• Decrease the distance
• Increase the distance

What must be the charge of the two particles and how do you know?

• They are both positive, the electric field lines repel each other and are heading out of the charges

• They are both positive, field lines repel each other and are heading toward the charges

• They are both negative, field lines repel each other and are heading out of the charges

• They are both negative, field lines repel each other and are heading toward the charges

If the distance between two charged particles is quadrupled (4 times larger), what will happen to the force between them?

• It becomes four times larger

• It becomes sixteen times larger

• It becomes four times smaller

• It becomes sixteen times smaller

The diagram above shows a point, P, located midway between two oppositely charged parallel plates.

If an electron is introduced at point P, the electron will

• accelerate toward the negatively charged plate

• travel at constant speed toward the negatively charged plate

• travel at constant speed toward the positively charged plate

• accelerate toward the positively charged plate

Identical charges A, B, and C are located between two oppositely charged parallel plates, as shown in the diagram below. The magnitude of the force exerted on the charges by the electric field between the plates is

• least on A and greatest on C

• the same on A and C, but less on B

• the same for A, B, and C

• greatest on A and least on C

Is work done on the positive charge to move it from point A to point B?

• Yes

• No

Electric potential energy is greatest at point...

• A

• B