Physics

• what partical orbits the nucleus

  Electrons
• What charge dose a electron have

  a negative charge
• define current 


  current is the rate of flow of negative electrons
• Is metal a good conductor 


  true
• how do you measure current using what 


  ammeter amps
• can you have to negitives facing each other in a circuit

  No it has to be negative then positive
• what dose a ammeter measuer

  amps current
• what happened to the current when you increase the voltage

  The voltage get higher and the current increases
• name 2 things you need for a complete circuit

  1. complete circuit 2. cell/battery
• in a parallel cirucit is the current shared equally

  yes
• What is the unti for resistance 


  Ω
• what happens to the current when you increase the number of bulbs.

  the current get smaller so a higher resistance
• what happened to the bulb brightness when you inrease the number of bulbs

  Is get duller because they have to share the energy
• What is a another term for voltage

  potential difference
• what is the unit of measurment of potential difference

  volts
• what dose potential difference measure

  the energy between two pints in a circuit
• what is used to measuer potential difference

  voltmeter
• define resistance 


  how much current is stopped the thing that is stopping the current
• dose a series circuit current split or the same

  same
• dose a parrele split or the same

  split
• dose a series potential split or the same

  split
• dose a parallel potential current split or the same

  smae
• what is the resistance equation


  V=IxR
• if their is a higher resistance the more what to flow 


  difficult
• If their is a longer wier is there a smaller of bigger resistance 


  there is a stronger resistance because their is a longer way to go and more atoms
• Three metals that are magnetic

  iron nickel cobalt
• If a north and a north were facing each other would they attract of repel

  they would repell
• if a north and a south were facing each-other would they attract or repel

  Attract
• Is steel magnetic why


  steel is magnetic becuase it is mostly ade up of iron
• dose magnetic have a magnetic field

  yes
• were is the strongest are and why of a magnets field

  the poles becuase the lines are the closest
• dose earth have a magnetic field

  yes earth dose have a magnetic field because their is iron in the earths core
• Which pole will move in the direction of the field lines

  the north pole
• what flows in a circuit to create a magnetic field

  current
• how can you increase the strength of a electromagnet

  put iron in the coil
• how electromagnets can be used in metal recycling industry

  you can turn it of and on by using and current and it can be really strong
• list three ways to increase the electromagnet

  increase number of coils add iron turn up the current/ voltage
• if you increase the voltage dose the electromagnet get stronger 


  yes the electromagnet gets stronger
• A material that conducts electricity is called a... what?

  conducter
• True or false? Plastics are used to cover electrical wires as they are good insulators.

  true