Electricity

• energy can be transferred electrically by movement of charged particles
• series circuit


  contains 1 loop
• parallel circuit


  contains 2 or more loops
• Current is Measured in


  Amps
• in series current is 


  same throughout
• in series potential difference 


  is the sum of all potential differences around components
• in parallel potential difference is 


  the same throughout
• in parallel current is 


  shared between loops
• in series resistance is 


  the sum of all the resistors
• in parallel resistance is 


  less than 1
• longer wire =the delocalised electrons more collisions with positive metal ions
• coulomb 


  a group of electrons
• resistance 


  how hard is is for current to flow
• potencial difference 


  a measure of energy transferred per coulomb of charge
• Time is measured in 


  seconds
• Q=IxT


  (charge)=(current)x(time)
• charge is measured in
• charge is measured in 


  coulombs
• charge 


  rate of flow of current
• E=VxQ

  energy= potential difference x current
• V=IxR

  potential difference=charge x resistance
• energy/energy transferred is measured in

  joules
• potential difference is measured in 


  volts
• resistance is measured in


  ohms
• cell:

  
• battery

  
• bulb

  
• ammeter

  
• voltmeter

  
• variable resistor

  
• fixed resistor

  
• thermistor

  
• light dependant resistor(LDR)

  
• diode

  
• light emitting diode

  
• ohms law


  current is directionally proportionate to voltage
• how to control temperature

  turn switch on and off between trials
• what is an example of an ohmic conductor?

  fixed resistor
• what is the purpose of a diode

  to make current only flow one way
• filament bulb: pd increases, temperature increases, resistance increases, current decreases