chapter 21 vocab
Terms
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- STEP-UP TRANSFORMER
- an electrical transformer that incresases the voltage of a power line.
- ELECTRIC FIELD
- an area surrounding an electron that exert a force on anything nearby with an electric charge
- OHM
- unit for measuring resistance
- POTENTIAL DIFFERENCE
- the difference in electric potential energy between 2 different points.
- STEP-DOWN-TRANSFORMER
- electrical transformer that decreases the voltage of a power line
- WET CELL
- power source that generates electric current by a chemical reaction using a liquid electrolyte
- INSULATOR
- a material that does not allow heat or electrons to move through it easily.
- WHAT IS POTENTIAL DIFFERENCE MEASURED IN?
- volts
- VOLTAGE
- difference in electrical potential.
- COULOMB
- the charge carried kby 6.24 billion billion electrons
- CIRCUIT
- a closed path through which electrons flow
- WHAT AND WITH WHAT IS VOLTAGE MEASURED IN
- volts, voltmeter
- PARALLEL CIRCUIT
- an electrical circuit where the current flows thrugh more than one path. If one path is interupted, current will still flow through the other paths.
- OHM'S LAW
- states that potential difference equals current multiflied by resistance
- GROUNDED
- electrically connected to earth, either directly or through a wire or other metal
- DRY CELL
- A power source that acts as an electron pump and generates electric current by a chemical reacion; uses thick, pasty electroyte.
- INDUCTION
- electrically charging an object or creating an electrical current in it, without physically touching it.
- WHERE IS THE ELECTRIC FIELD STRONGEST AND WEAKEST?
- strongest nearest the electron and weakens with distance
- KILOWATT HOUR
- the unit of electrical energy
- WHAT IS ELECTRICAL POWER MEASURED IN?
- watts or kilowatts
- CIRCUIT BREAKER
- device that protects an electrical circuit. If too much current flows. the device opens the cricuit and stops the circuit.
- ELECTRICAL POWER
- the rate at which electrical energy is converted to another form of energy,
- WHAT IS RESISTANCE MEASURED IN?
- ohm's
- STATIC ELECTRICITY
- the net buildup of electric charges on an object
- VOLT
- unit for measuring electrical potential energy
- ELECTROSCOPE
- A device containing 2 suspended metal leaves in a jar that move apart when charged; used to detect the presence of electric charges.
- CONDUCTOR
- A MATERIAL THAT ALLOWS ELECTRONS TO MOVE EASILY THROUGH IT.
- AMPERE
- unit of measuring current, the rate of flow of electrons in a circuit.
- SERIES CIRCUIT
- an electriacl circuit where the current has only 1 path. If the path is interupted in any point, it stops current flow in the entire circuit.
- CURRENT
- the flow of electrons through a wire or any conductor, measured in amperes with an ammmeter.
- RESISTANCE
- the oppostion to the flow of electrons through a conductor.