PhysSci(H) - Charge & Coulomb's Law

Charge & Coulomb's Law "Quiz"

Use the pHet simulation on Coulomb's Law to help answer the following questions.

https://phet.colorado.edu/en/simulations/coulombs-law

Multiple Choice

Charge is a fundamental property of matter... all atoms have charged particles. Which parts of an atom are charged (positive or negative)?

• Protons & electrons

• Protons & neutrons

• Neutrons & electrons

• Only protons

• Protons, neutrons, and electrons are all charged

Multiple Choice

Charge is a fundamental property of matter that is inherent to certain atomic particles. Which particle in the atom has a positive charge?

• Proton

• Electron

• Neutron

• Nucleon

Multiple Choice

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 the substance is rubbed?

• Protons

• Neutrons

• Electrons

• The whole nucleus

Multiple Choice

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

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

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

Multiple Choice

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)

Multiple Choice

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.

Multiple Choice

Charge is a fundamental property of matter... all atoms have charged particles. Which option shows the correct list of particles and their charges?

• Protons (+)

  Electrons (-)

  Neutrons (-)

• Protons (+)

  Electrons (0)

  Neutrons (-)

• Protons (+)

  Electrons (-)

  Neutrons (0)

• Protons (0)

  Electrons (-)

  Neutrons (+)

Multiple Choice

Atoms can have a "net charge" of zero even though it has charged bits within it. This is possible when...

• There are enough neutral neutrons to overwhelm the + charged protons and - electrons

• There is an equal number of + protons and - electrons

• There is an equal number of + protons and neutral neutrons in the nucleus

Multiple Choice

What is the net charge of an atom that has...

3 protons

4 neutrons

2 electrons

• +3

• -4

• -1

• +1

• 0

Multiple Choice

What is the net charge of an atom that has...

13 protons

14 neutrons

10 electrons

• +13

• -14

• -10

• +3

• -2

Multiple Choice

What is the net charge of an atom that has...

53 protons

74 neutrons

54 electrons

• +53

• -54

• 74

• +1

• -1

Match

Use Coulomb's Law (and/or simulator) to match the scenario with the outcome.

• Increase the distance between charges...

• Double the amount of charge on both objects...

• Decrease the distance between the objects to 1/3 the original...

• Decrease the amount of charge by 1/2 on both objects...

• Change the sign (+/-) on one of the charges...

the electric force will decrease.

the electric force will be 4x larger.

the electric force will be 9x larger.

the electric force will be 1/4th.

the electric force direction changes.

• the electric force will decrease.

• the electric force will be 4x larger.

• the electric force will be 9x larger.

• the electric force will be 1/4th.

• the electric force direction changes.