Lesson 1
The accumulation of excess electric charge on an object.
Static electricity
The transferring of electrical charge between objects by touching or rubbing.
Charging by Contact
A closed path that electric current follows.
Electric circuit
Rate at which electrical energy is converted to another form of energy; expressed in watts (W)
Electrical power
Electrical power is the rate at which what is converted into other forms of energy?
Electrical energy
States that charge can be transferred from one object to another but it cannot be created or destroyed.
Law of Conservation of Charge
The rearranging of electrons on a neutral object caused by bringing a charged object close to it.
Charging by Induction
Tendency for a material to oppose electron low and to convert electrical energy into other forms of energy, such as thermal energy and light.
Resistance
Charging by induction is the rearrangement of what in an object.
Charge
Resistance is the tendency of a material to resist the flow of what?
Electric charge
A region surrounding every electric charge in which a force of attraction or repulsion is exerted on other electric charges.
Electric field
A device, sometimes consisting of two leaves of metallic foil, used to detect electric charge.
Electroscope
States that the current in a circuit equals the voltage difference divided by the resistance.
Ohm's law
A voltage difference is related to the what that causes charges to flow.
Force
Electric current is the net movement of electric charge in what?
A single direction
Material, such as copper wire, through which electrons can move easily.
Conductor
The net movement of electric charges in a single direction, measured in amperes (A)
Electric current
Circuit in which electric current has only one path to follow.
Series circuit
A circuit is a what conducting path?
Closed
What is surrounded by an electric field that exerts forces on other charges?
Electric charge
Material in which electrons and thermal energy are not able to move easily.
Insulator
Related to the force that causes electric charges to flow; measured in volts (V)
Voltage difference
Circuit in which electric current has more than one path to follow.
Parallel circuit
Two types of circuits are what?
Series circuits and parallel circuits
Electric charge can be what but cannot be what.
Transferred; created or destroyed