Current in a Magnetic Field

Current in a Magnetic Field

1. Define

   • Magnetic Flux Density
   • The Tesla
   • The Ampere
   • The Coulomb

2. State

   • Fleming's left hand rule
   • Unit of magnetic flux density
   • The factors on which the size of the force on a current carrying conductor in a magnetic field depends

3. Recall that

   • A current carrying conductor experiences a force when placed in a magnetic field
   • The direction of the force is perpendicular to the current and magnetic field
   • The size of the force is directly proportional to the current, length of the conductor and strength of the magnetic field.
   • Current carrying conductors exert forces on each other due to their magnetic fields
   • A charged particle moving in a magnetic field experiences a force
     • A charged particle moving perpendicular to a magnetic field moves in a circle

4. Describe an experiment to show:

   • The force on a current carrying conductor in a magnetic field
     • The forces on a current carrying coil in a magneticfield
       • That current carrying conductors exert forces on each other
         • The principle on which the definition of the ampere is based

5. List

   • Three practical applications of the force on a current carrying coil in a magnetic field

6. Formulae

   • F=IlB
   • F=qvB
   • F = mv^2/r

7. Derive

   • F=qvB