Studied by 8 peopleWhat is electricity?
Is the flow of electrons from 1 place to another.
Is electricty a secondary or primary energy source
Secondary source, it is converted form something else (sunlight, coal, oil)
What is static electricity?
An accumulation of charge
What is current electricity?
A flow of electrons
What are conductors and an example
Low resistance to Allow the flow of eletricity (eg metal)
What are insulators?
High resistance to Prevent the flow of electricity (eg rubber)
What is a simple circut
Consists of a power source, a conductor, and a load (like a lightblub.
Open circut
broken path; when the switch is off
Closed circut
complete circut - electricty only flows in closed circuts
Power souce example
Battery
Conducters example in the circut
Wires
Resistors example
A light bulb
Electricity is measured in
Volts for potential differeces, amps for current and ohms for resistance
Where does a voltmeter go in a circuit?
across a component outside of the circut
Where does the ammeter go in a circuit?
In the circut
V/I =
Resistance
V/R =
Current
I x R =
Voltage
Why is resistance important in a electric circut
To ensure the current flows at appropriate levels
Voltage
A measure of how much energy is given to each electron moving through a circut
Voltage drop
Across a component to see what is being used
Current
A measure of the rate electrons move through a circut
High Amps =
Lots of electrons
Low Amps =
Low amounts of electrons
increasing resistance
slows current
Increasing voltage
speeds up current
In a series circut =
Voltage is divided by the amount of loads
Current stays the same
In a parallel circurt =
Voltage stays the same
Current divides by the number of branches
Resistance
A material's opposition to the flow of electric current.
What are the uses of parallel circuts
The lights in our homes so that they can turn on some and not all.
how do you do the calculations in series circuts
Use the resistance levels of the whole circut
how do you do the calculations in parallel circuts
Use the resistance levels of the just the load
What are electrical hazards
Electrical connections not handled properly, may result in electric shock, burn, or other injury.
What is short circut
When the current takes an easier path that is unintended. This leads to an increase in the strength of the current resulting in fire or high heat
What is a circut breaker
When a current in a circut passes the saftey limit a circut breaker automatically switchs it off preventing danger
How do electrical sockets work
Current flows through the netural and active sockets some may include an earth pin into the wires to get rid of lose electricity
What is the role of the earth wire?
A wire that is found in home circuts and some appliances to safely dispose of electricity into the ground incase of a fault or short circut. In case of a short circut it would connect to the active pin making an even shorter
Note
Flashcard