physics revision ap2

• the current in a parallel circuit is?

  shared between the branches
• the potential difference in a parallel circuit is?

  the same along all components
• the current in a parallel circuit will or will not go through all components?

  will not
• joules to kilojoules is?

  /1000
• kilojoules to joules is?

  x1000
• charge equation is?

  current x time
• potential difference equation is?

  energy / charge
• resistance equation is?

  potential difference / current
• resistance total calculation is?

  r1 + r2 =rtotal
• resistance in a circuit increases when more resistors is added
• adding more resistors to a series circuit increases the total resistance because if we add more resistors the current is reduced but the d.d is the same so the resistance is higher .
• why are metals good electrical conductors?

  because their delecolalised electrons are able to move through the structure and carry a electrical charge.
• how does the current act in a series circuit?

  it is the same in all components
• if another component is added or removed in a series circuit what will happen?

  the current would decrease as it reduces the flow but if a component is removed the current will increase
• the p.d in a series circuit is?

  shared
• series circuits total resistance of all components is equal to the sum of the resistance of each component
• adding more resistors in a parallel circuit will reduce the total resistance
• the total resistantce of 2 resistors in a parallel is less then the resistance of the smallesst individual resistor
• what current is this?

  
• what current is this ?

  
• what symbol this is

  resistor
• what symbol this this

  variable resistor

  
• pd triangle order?

  energy, p.d , charge
• charge triangle order

  charge, current, time
• resistance triangle order

  pd, current, res
• parallel circuit

  a2 = 1

  a3 = 1

  a4 = 1

  a5 = 3

  this is because the branches add up to the total of the other branches, the sum adds up to the total

  
• in a parnell circuit if more resistors are added what will happen

  decrease the resistance because adding more resistors increases the total current