Coulomb law

Like charges __________ and opposite charges ________.

• attract, repel

• attract, attract

• repel, attract

• repel, repel

By default, charge 2 (red) has a value of +8 uC (micro-Coulombs). The positive value indicates that this particle (labeled q2) has a ___________ charge.

• Negative

• Positive

• Positive

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

If q1 = -4 uC and q2 = +8; these charges will ________ one another.

• attract

• repel

• do nothing

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

In this exercise, we reduced the distance by half (that is, put them closer together), and as a result the force (F) __________ by a factor of _____.

• increased; one-fourth

• decreased; double

• increased; four

• decreased; 10

Tags

NGSS.HS-PS2-4

When a balloon is rubbed on clothes it acquires a charge by ___________

• Induction
• reduction
• friction 
• concuction

Which of the following is not a good insulator?

• Copper
• Glass
• rubber
• wool

Tags

NGSS.MS-PS3-3

Insulators are different than conductors in that insulators ____.

• do not contain electrons or protons 
•  do not contain any charge
• have a weaker affinity for electrons 
• do not allow charge to freely move 

Why does the child's hair stick up?

• The boy is grounded since he's at the bottom of the slide

• He gained a charge from the slide, and since he's not grounded, his hairs have the same charge so they repel one another

• He gained a charge from the slide, and since he's not grounded, his hairs have opposite charges so they repel one another

• When hair is neutral, some have a positive side and some have negative side, so they will attract to each other, making it stand up

Tags

NGSS.HS-PS2-4

The magnitude of the electrostatic force between two point charges is F. If the distance between the charges is doubled, the electrostatic force between the charges will become

• 4F

• 2F

Tags

NGSS.HS-PS2-4

What is the approximate electrostatic force between two protons separated by a distance of 1.0 x 10^-6 meter?

• 9.0 x 10²¹ N and attractive

• 9.0 x 10²¹ N and repulsive

• 2.3 x 10^-16 N and attractive

• 2.3 x 10^-16 N and repulsive

Tags

NGSS.HS-PS2-4