Studied by 3 people
Ohms Law
________: the current in a circuit equals the voltage difference divided by the resistance.
Atoms
________ contain particles called protons, neutrons, and electrons.
Resistance
________: the tendency of a material to oppose the flow of electrons, changing electrical energy into thermal energy and light.
Metal Wire
In a(n) ________, or any material, electrons are in constant motion in all directions.
Electrons
________ are bound more tightly to some atoms and molecules.
Cell
A(n) ________ consists of two electrodes surrounded by a material called an electrolyte.
Battery
A(n) ________ can provide the voltage difference that is needed to keep current flowing in a circuit.
Electrical Conductors
________ have much less resistance than insulators.
Insulator
________: A material in which electrons are not able to move easily.
negative charges
Positive and ________ exert forces on each other.
Copper
________ is an excellent conductor and has low resistance to the flow of electrons.
parallel circuits
In ________, the current follows more than one path.
Chemical Reactions
________ in batteries produce a voltage difference between the positive and negative terminals.
Circuit
________: A closed path that electric current follows.
Plastic
The ________ coating around wires is an insulator.
parallel wiring
Houses, automobiles, and most electrical systems use ________ so individual parts can be turned off without affecting the entire circuit.
Protons
________ have positive electric charge and electrons have negative electric charge.
Series Circuit
A(n) ________ provides only one path for the current to follow.
Transfer of Electrons
Rubbing two materials together can result in a(n) ________.
Electric Resistance
The ________ of most materials usually increases as the temperature of the material increases.
Frictional Force
The ________ between two surfaces in contact is due to the attractive electric forces between the atoms on the two surfaces.
Presence of Electric Charges
The ________ can be detected by an electroscope.
Static Electricity
________: The accumulation of excess electric charge on an object.
Voltage Difference
________: related to the force that causes electric charges to flow.
Electric Current
________ is measured in amperes.
Flight of Stairs
The movement of an electron in an electric current is similar to a ball bouncing down a(n) ________.
Circuit Breaker
A(n) ________ contains a piece of metal that bends when the current in it is so large that it gets hot.
Wet - Cell Battery
A(n) ________ contains several wet cells connected together.
Earth
________ is a large, neutral object that is also a conductor of charge.
Voltage Difference
________ is measured in volts.
Series Circuits
________ are used in flashlights and some holiday lights.
Parallel Circuit
________: contain two or more branches for current to move through.
Cell
The ________ is called a dry ________ because the electrolyte is a moist paste, not a liquid solution.
Series Circuit
________: the current has only one loop to flow through.
Static Electricity
The accumulation of excess electric charge on an object
Law of Conservation of Charge
Charge can be transferred from object to object, but it cannot be created or destroyed
Conductor
A material in which electrons are able to move easily
Insulator
A material in which electrons are not able to move easily
Charging by Contact
The process of transferring charge by touching or rubbing
Charging by Induction
The rearrangement of electrons on a neutral object caused by a nearby charged object
Electric Current
The net movement of electric charges in a single direction
Circuit
A closed path that electric current follows
Resistance
the tendency of a material to oppose the flow of electrons, changing electrical energy into thermal energy and light
Ohms Law
the current in a circuit equals the voltage difference divided by the resistance
Parallel Circuit
contain two or more branches for current to move through
Electrical Power
The rate at which electrical energy is converted to another form of energy
Note 
Flashcard (24)