Series/Parallel Circuits

• Voltage is also known as

  Potential Difference
• Series Circuits

  -the current is the same everywhere

  -voltage splits according to resistance(ohms)

  -total potential difference is shared between each component
• Parallel circuits

  -current splits according to resistance at junctions

  -voltage is the same across each branch

  -total current into a junction = total current in each of the branches

  -the potential difference across each component is the same
• If two resistors are connected in parallel, what can be said about their combined total resistance?

  Their total resistance is less than the smallest of the two individual resistances
• If two resistors are connected in series, what can be said about their total resistance?

  Their total combined resistance is equal to the sum of the two individuals resistances
• Where must a voltmeter be placed in a circuit

  In parallel with the component that is being measured
• Give an equation relating potential difference with energy transferred

  V=E/Q
• A volt can also be described as a

  Joule per coulomb J/C
• State the equation linking charge, current and time

  Q=It
• What two factors does the current in a circuit depend on?

  -Potential Difference

  -Resistance
• What equation should be used to calculate potential difference if current and resistance are known?

  V=IR
• Where must ammeters be connected in a circuit

  Ammeters are placed in series with the component it is required to measure