# P5

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• P5-Electricity
• Static Electricity
• Circuits
• Series
• The current is the same across the circuit
• The potential difference is different around components because voltage is shared. When added up it is the same as the potential difference of the battery.
• Resistance adds up from the individualcomponents
• Parallel
• Total current is shared between branches and all components
• The potential difference is the same across all components(including battery) as the voltage is the same everywhere in the circuit
• Potential difference is the 'work done'- the amount of energy transferred / voltage between two points in a circuit.
• Series
• The current is the same across the circuit
• The potential difference is different around components because voltage is shared. When added up it is the same as the potential difference of the battery.
• Resistance adds up from the individualcomponents
• Voltmeter measures this in Volts,
• The Voltmeter must be placed in parallel with a component so it can compare the energy the charge has  before and after passing through the component.
• When energy is transferred, 'work is done'
• Symbols
• REMEMBER WHAT THEY LOOK LIKE
• The voltage of a battery shows how much work the battery will do to the charge that passes through it(how big a "push" it gives it)
• Resistance
• Voltage divided by Current
• Measured in Ohms
• Transformers
• Only uses AC
• Step up
• More turns on the secondary coil.
• Increases voltage
• Step down
• more turns on the primary coil
• Decrease voltage
• 4 things needed to change the size of a voltage
• Increasing turns on a coil
• Increasing speed of rotation
• Increasing the strength of the magnetic field
• Electromagn-etic Induction
• Generators
• Motors
• Uses DC
• Fleming's Left Hand Rule
• thuMb Motion
• First finger Field
• Second finger Current
• What can electric motors be used in?
• Washing Machines, Fridges, and Vacuum cleaners
• In a DVD player
• Magnetic Fields
• Current
• Voltage divided by Resistance
• Measured with ammeter, amps
• Flow of free electrons
• The split -ring commutator is a clever way of swapping the electrical contacts every half turn
• This reverses the direction of the current every half turn to keep the coil rotating continuously in the same direction
• Motors
• Uses DC
• Fleming's Left Hand Rule
• thuMb Motion
• First finger Field
• Second finger Current
• What can electric motors be used in?
• Washing Machines, Fridges, and Vacuum cleaners
• In a DVD player