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Resistance
________: the tendency for 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.
battery
A(n) ________ can provide the voltage difference that is needed to keep current flowing in a circuit.
cell
A(n) ________ consists of two electrodes surrounded by a material called an electrolyte.
Electrical conductors
________ have much less resistance than insulators.
Insulator
________: A material in which electrons are not able to move easily.
Ohms Law
________: the current in a circuit equals the voltage difference divided by the resistance.
Copper
________ is an excellent conductor and has low resistance to the flow of electrons.
Circuit
________: A closed path that electric current follows.
Protons
________ have positive electric charge and electrons have negative electric charge.
electrolyte
The ________ enables charges to move from one electrode to the other.
transfer of electrons
Rubbing two materials together can result in a(n) ________.
Electric current
________ loses energy as it moves through the filament because the filament resists the flow of electrons.
electric resistance
The ________ of most materials usually increases as the temperature of the material increases.
Static Electricity
________: The accumulation of excess electric charge on an object.
Parallel Circuits
________: contain two or more branches for current to move through.
Electric Power
________: The rate at which electrical energy is converted to another form of energy.
wet cell battery
A(n) ________ contains several wet cells connected together.
electrolyte
The ________ is a moist paste containing several chemicals.
Voltage difference
________ is measured in volts.
Electric current
________ is measured in amperes.
Series Circuit
________: Current has only one loop to flow through.
Circuits
________ also include conductors such as wires that connect the devices to the source of voltage difference to form a closed path.
Voltage Difference
________: related to the force that causes electric charges to flow.
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
Voltage Difference
related to the force that causes electric charges to flow
Circuit
A closed path that electric current follows
Series Circuit
Current has only one loop to flow through
Series circuits are used in flash
lights and some holiday lights
Parallel Circuits
contain two or more branches for current to move through
Electric Power
The rate at which electrical energy is converted to another form of energy
