P4

• Unit for spring constant

  N/m
• Units for kinetic energy

  Joules
• What is a motor?

  A loop of wire in a magnetic field
• What is an electromagnet?

  An object that becomes magnetic when an electric current passes through it
• What does a larger current cause?

  A stronger field
• What does the core do?

  Make the field stronger
• Unit for volume

  m^3
• Unit for charge

  Coulombs
• Unit for weight

  Newtons
• What are solenoids?

  Coils of wire
• Unit for specific heat capacity

  J/kg°c
• What does adding more coils do?

  Make the field stronger
• 3 parts of the electromagnet 


  The core

  The coil

  The current
• Units for magnetic flux density

  Tesla