Electrostatics

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 similar metal spheres, A and B, have charges of +2.0 x 10^-6 coulomb and +1.0 x 10^-6 coulomb, respectively. The magnitude of the electrostatic force on A due to B is 4.0N newtons. What is the magnitude of the electrostatic force on B due to A?

• 2.0N
• 4.0N
• 8.0N
• 1.0N

Tags

NGSS.HS-PS2-4

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

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

The law of conservation of charge states that...

• all atoms have more protons than electrons
• only protons can be rubbed off of an atom
• charge cannot be created or destroyed
• charge cannot be transferred 

When the distance between two charges is halved, the electrical force between the charges

• quadruples

• reduces to one fourth

• halves

• doubles

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

which is the field for opposite charges

• 
• 
• 
• 

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

Sphere A carries a charge of +8 coulombs, and Sphere B carries a charge of -6 coulombs.  If the two are touched together and then separated, what will the charge on sphere A be?

• +1
• -1
• +2
• -2

A pith ball has an electric charge +q, and it feels a force F when placed a distance 2d from a second pith ball with an electric charge +q. When the second pith ball gains charge to have a charge +3q, and is moved to a distance 4d, the force on the pith ball is ---.

• 2/9 F

• 3/4 F

• 3/2 F

• 6F

Tags

NGSS.HS-PS2-4

The electrostatic force between two charges located 8 meters apart is 0.10 N. What will the force be between these charges when they are located 2 meters apart? 

• 0.01 N  
• 0.03 N 
• 0.1 N 
• 1.6 N

A region of space contains a uniform electric field, directed toward the right, as shown in the figure. Which statement about this situation is correct?

• The potential at point A is the highest, the potential at point B is the second highest, and the potential at point C is the lowest.
• The potential at points A and B are equal, and the potential at point C is lower than the potential at point A.
• The potential at all three locations is the same.
• The potentials at points A and B are equal, and the potential at point C is higher than the potential at point A.

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5