Materials and Electricity
This is a material that allows electrons to easily flow through it.
a conductor
When do two charged objects attract?
when they have opposite charges
This is the force between electrostatic charges.
electrostatic field
How many electroscopes are needed to test conduction?
2
This type of material does not allow electrons to flow through it.
insulator
When do two charged objects repel?
when they have the same charge
Electrostatic charges are produced by the addition or removal of ____.
electrons
How did Greeks discover static electricity.
rubbing amber with a piece of fur
Is metal a conductor, insulator, or semiconductor?
conductor
What stores charges in an electrical circuit?
a capacitor
This is used to show the direction of electrostatic charge at each point in the field.
lines of electric force
What is the total capacitance of 2 5.0mC capacitors connected in parallel?
10 mC
This type of material can act as a conductor or insulator.
semiconductor
What happens in an electrical discharge?
An object loses its charge.
This is the force per unit of charge at each point in the field.
electric field strength
Is glass a conductor, semiconductor, or insulator?
insulator
Describe the movement of electrons through a conductor.
Electrons move from areas of higher electric potential to areas of lower electric potential.
This was invented to store a charge.
Leyden jar