Electric charge & Coulomb's Law

Which of the following materials conducts electricity the best?

• plastic

• rubber

• metal

• glass

Tags

NGSS.HS-PS1-3

Which situation builds up static charge on an object?

• When there are more neutrons than electrons

• When all neutrons have been removed from the object

• When there are more protons than neutrons

• When there are more electrons than protons

Tags

NGSS.HS-PS3-5

Why does a PVC pipe have a negative charge after being rubbed with a cloth?

• The PVC pipe gains electrons from the cloth

• The PVC pipe loses electrons to the cloth

• The cloth gains protons from the PVC pipe

• The PVC pipe gains protons from the cloth

A balloon is rubbed on a student's head. What occurs because of this?

• Charged particles on the balloon are destroyed

• Positively charged particles move from head to balloon

• Charged particles from the balloon are released into the air

• Negatively charged particles move from head to balloon

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

How does a neutral object become positively charged?

• remove protons

• remove electrons

• add electrons

• add protons

Which two particles are attracted to each other?

• Two neutrons

• A proton and an electron

• Two protons

• An electron and a neutron

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

A repulsive force exists between which two particles?

• Two neutrons

• An electron and a neutron

• An electron and a proton

• Two protons

Tags

NGSS.HS-PS2-4

As two oppositely charged particles approach each other, what happens to the electrical force between them?

• The attractive force increases

• The magnitude of the electric force decreases

• The repulsive force increases

• The magnitude of their charges increases

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

A student puts their hand on a positively charged Van de Graaff generator and holds it there. This causes electrons to flow from the student to the generator. Which method of charging caused the transfer of electrons from the student to the generator?

• conduction

• friction

• induction

• gravity

What happens to the electric force between two charges when the distance is tripled?

• 3 times less electric force

• 3 time more electric force

• 9 times less electric force

• 9 times more electric force

Tags

NGSS.HS-PS2-4