Coulomb's Law II

Which setup of charged particles shown below has the two exert the most force on one another?

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Tags

NGSS.HS-PS2-4

Since Coulomb's Law is written as

 $F_e=k\cdot\frac{q_1\cdot q_2}{d^2}$   this means that as the distance between the two charged objects gets smaller, the electric force ---.

• gets weaker
  

• gets stronger
  

• changes unpredictably
  

• does not change
  

Tags

NGSS.HS-PS2-4

One key difference between the way that Newton's Law of Universal Gravitation says gravity behaves and the way Coulomb's Law says the electric force behaves is ---.

• there are two types of electric charge that can neutralize each other, but only one type of mass

• the electric force depends on the distance between charges but the gravity force does not depend on the distance between masses

• gravity can both attract and repel, but electric force can only attract

• gravitational force can act over long distances, but electric force only acts over short (subatomic) distances

Tags

NGSS.HS-PS2-4

What happens to the force between two charged objects when you double the distance between them?

• 2X
• 1/2X
• 4X
• 1/4X

Tags

NGSS.HS-PS2-4

What direction will the charge in the middle move?

• to the right

• to the left

• stay still

• cannot be determined

Tags

NGSS.HS-PS3-5

If one of the charges doubles, what happens to the force?

• it doubles

• it gets cut in half

• it quadruples

• it is cut by 1/4

Tags

NGSS.HS-PS2-4

Coulomb's Law is written as

 $F_e=k\cdot\frac{q_A\cdot q_B}{d^2}$  What are the units of F (or Fe)?

• newtons

• meters

• coulombs

• joules

Tags

NGSS.HS-PS2-4

When distance increases, electrostatic force ____________; we call this relationship ____________ proportional

• decreases;directly
• decreases;inversely
• increases;inversely
• increases;directly

Tags

NGSS.HS-PS2-4

The force between two point charges is F when they are separated by a distance r.

If the separation is increased to 3r, what is the force between the charges?

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Tags

NGSS.HS-PS2-4

The image shows two charged particles with a force of 2.4 N. What would you predict the force of interaction would be when the distance doubles?

• 4.8 N

• 1.2 N

• .6 N

• .3 N

Tags

NGSS.HS-PS2-4