Electromagnet

 

Electromagnet demo picture

  • Connect a 9V battery ( or power supply) to copper wire coils to create a horseshoe magnet. Vary current to vary strength of magnetic force.
  • Strength of force can be measured using plate with hook (shown above), and spring force scale (L02, section A-1).
  • Located in L01, section

 

Current in Solenoid

 

Current in Solenoid demo picture

  • Purpose: Illustrate principles of electro-magnetic induction.
  • Send current through solenoid and measure direction of B-field
    using B-field indicator (magnaprobe). Place coil of wire in front of solenoid
    and quickly adjust current; galvanometer will indicate induced emf consistent
    with Lenz’s law.

Location

  • Solenoid and wire coil located in L01, section B2.
  • Power supply- L35, section F1;
  • magnaprobe- L35, section E4, top shelf
  • galvanometers- L35, section F3