Current Electricity Flashcards
Current electricity
The continues flow of electrons in a circuit
Circuit
Pathway for electrons to flow
Battery
Converts chemicals that conducts electricity
INCLUDES THREE PARTS
-ELECTROLYTE: paste that conducts electricity
-ELECTRODES: a metal strip that reacts with the electrolytes
-TERMINAL: the end points (electrodes) in a battery where we make connections
Components of a simple circuit
Switch (controls movement of electrons in a circuit)
Closed (electrons can move)
Open (electrons cannot move)
Load (converts electrical energy to some other form of energy e.g lightbulb, music player)
Conducting wire (pathway for electrons to travel)
Source of energy (electrons flow from the negative to the positive terminal e.g battery)
Resistance
Degree in which a substance opposes the flow of electrons & converts electrical energy to other forms of energy e.g heat and light
-measured in ohms Ω using an ohmmeter
Resistor
material that slows current flow in a circuit meanwhile converting energy into another form
V (potential difference)
difference in electric charge
volts (v)
voltmeter
I (current)
flow of electrons
Units: Amperes (A)
Measured Device: Ammeter
R (resistance)
Oppose electron flow
Units: ohms Ω
Measured device: ohmmeter
ammeter
is a device that measures currents
Voltmeter:
measures the voltage or potential between two points of an electron.
Some factors of resistance are
temperature, length, area of cross-section, and the material used.
when a wire is heated, the resistance increases.
Series Circuits:
an electric circuit with only one path to follow
Parallel Circuits:
an electric circuit that has more then one path to follow.
Voltage
The pressure from a power source that pushes electrons thought a circuit.
measured in units called volts using voltmeter
Current in Circuit
Electric current refers to the flow of electricity in an electronic circuit, and to the amount of electricity flowing through a circuit
Fuse
if the current gets to high, the current flow will melt and the current flow will stop.
Circuit Breaker
the wire bends under high temperature to stop the flow. once cooled it can reset.
three prong bar
3rd prong connects to a device to the ground wire of the building. it directs excess current to the ground instead of shocking person using it.
ttyy ground fault
detests a change in current and open the circuit to stop the current flow.
short circuit
an accidental low-resistance connection between two points in a circuit.
Smartmeters
digital electrical meter that are able to measure how much electricity they use and would be.
Energuide
Label indicating how much energy will use in a year.
energy star
sticker put on appliances to indicates the appliance is one of the most efficient in its class
