Coulombs

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

Coulombs Law describes the math relationship between charges and the force between those charges (either attracting or repelling). Which changes would make the force between two charges STRONGER?

• Increase the distance (r) between the charges

• Decrease the distance (r) between the charges

• Decrease the amount of charge on either or both charges (q)

Tags

NGSS.HS-PS2-4

Coulombs Law describes the math relationship between charges and the force between those charges (either attracting or repelling). Which option would result in attraction.

• A balloon is rubbed on a cat which causes electrons to be pulled of the cat's hair and caught on the balloon. Thus, the balloon has a net negative charge and the cat is net positive.

• Two balloons are rubbed on a cat which causes electrons to be pulled of the cat's hair and caught on the balloon. The two negative balloons are held near each other.

• A balloon is rubbed on two cats which causes electrons to be pulled of the cat's hair and caught on the balloon. The two cats are placed near each other to see what their fur does.

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

Charge is a fundamental property of matter, ultimately due to the charge of certain particles in an atom. Something as simple as rubbing two objects together can move some particles from one substance to the other. Which part of the atom is moved from one substance to another when rubbed?

• Protons

• Neutrons

• Electrons

• The whole nucleus

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

According to Coulomb, what happens to the electric force when the magnitude of the electric charges increases?

• It decreases proportionally.

• It remains the same.

• It increases proportionally.

• It is halved.

Tags

NGSS.HS-PS2-4

According to Coulomb's Law, the force between two point charges is inversely proportional to what?

• The square of the distance between the charges

• The product of the charges

• The sum of the charges

• The distance between the charges

Tags

NGSS.HS-PS2-4

What is used to calculate the magnitude of electric forces between charged objects?

• Newton's Law

• Coulomb's Law

• Ohm's Law

• Faraday's Law

Tags

NGSS.HS-PS2-4

How do charge signs affect the direction of the force between charged objects?

• Like charges repel each other, and unlike charges attract each other.

• Like charges attract each other, and unlike charges repel each other.

• Charge signs do not affect the direction of the force.

• The force is always attractive regardless of charge signs.

Tags

NGSS.HS-PS2-4

What is the value of Coulomb's constant (k) in the formula F = k * (|q1 * q2| / r^2)?

• 8.99x10^9 N·m^2/C^2

• 9.81 m/s^2

• 6.67x10^-11 N·m^2/kg^2

• 1.60x10^-19 C

Tags

NGSS.HS-PS2-4

In the formula F = k * (|q1 * q2| / r^2), what do q1 and q2 represent?

• Electrostatic force in Newtons (N)

• Charges (+ or -) in Coulombs (C)

• Distance in meters (m)

• Coulomb's constant

Tags

NGSS.HS-PS2-4