electromagnetism

• what is produced when a current flows through a conducting wire?

  magnetic field is produced around the wire
• what determines the strength of the magnetic field around a current-carrying wire?

  • current through wire
  • distance from wire
• what is a solenoid?

  coil of wire with current flowing
• what does shaping a wire to form a solenoid do?

  increase strength of the magnetic field created by the current around the wire
• describe the magnetic field inside a solenoid

  strong and uniform
• what is the magnetic field inside a solenoid similar to?

  bar magnet
• what does adding an iron core do to a solenoid?

  increases the strength of the magnetic field, it becomes an induced magnet whenever current is flowing
• what is an electro magnet?

  a solenoid with an iron core
• how does solenoid arrangement increases strength of a magnetic field?

  • the field lines around each loop of wire line up with eachother
  • this results in a lot of field lines pointing in the same direction that are very close to each other
  • the closer together field lines are, the stronger the magnetic field