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What are factors of series circuits?
Current are the same for all components
Supply voltage is split between components
rtotal = r1+r2+..
Factors of paralel circuits
current is split between paths
supply voltage is the same to each path
1/rtotal=1/r1+1/r2+..
What happens when you increase resistance
Increased voltage
Resistance definition
Electricity is the flow of electrons. Electrons traveling through a circuit will face resistance. This is where the electron collides with atoms, making it difficult for the electrical current to flow, causing resistance.
resistance unit
Ohms
definition charge
flow of electrical charge
defintion voltage
measurement the force that makes electrical current
symbol of resistance
R
How is the graph of an ohmic conductor
directly proportional with x axis potential dif y axis current
What is a transformer
A transformer is a machine which can transform one voltage into a higher or lower voltage.
How does a transformer work?
Electromagnetic induction
transformer equation
Vp/Vs=Np/Ns or Primary voltage/Secondary voltage=Primary coils/Secondary coils
Transporting voltage
As the diagram below shows, the current inside the cables is kept low and the voltage kept high. The opposite is true at the power station and in your home
What is the national grid
4. The National Grid is the giant network of cables that distributes electricity to the whole of the Britain
A step up doees what
Increase voltage decrease current
whats a solenoid
Wire shaped into coils is called a solenoid.
A solenoid has a stronger magnetic field than a straight wire.
how can a solenoid be strengthened
Increasing the current.
Increasing the number of coils.
A solenoid iwth an iron core is what
electromagent
definition of motor
which convert electrical energy into mechanical energy
generator meaning
which convert mechanical energy into electrical energy
whats the right hand grip rule
if thumb is up the magnetic field is clockwise
the thumb of flemings left hand rule is?
motion
first finger of flemings left hand rule is
magnetic field
second finger for flemings left hand rule is?
Current
Magnetic flux density is what
The strength of the magnetic field
Tesla's unit is?
SI
How do you calculate MFD
F=BIL
To make a transformer a genertaor what do you do
cut out a section of the iron core, make it dc current so it becomes an electromagnet, turn the cut out bit
Are flemings left hand rule used for generators or motors
Motors
Flemings RHR is the same as LHR but what is it used for
generators
Power unit,symbol,unit name
P watts w
Energy unit , symbol and symbol name
E, Joule, J
Voltage unit symbol symbol name
V volts V