Demos by PIRA

5H10 Magnetic Fields


  5H10.11Large compass needle on stand.
  5H10.15Dip needle compass.
  5H10.25Compass needle shows field around a high current wire on bench top.
  5H10.30Iron filings and permanent magnets to show field on an OHP.

5H15 Fields and Currents


  5H15.10Iron filings around a high current vertical wire on OHP to show field.
  5H15.10Iron filings around a current carrying coil on OHP to show field.

5H20 Forces on Magnets


  5H20.20Wobbly bar: Magnets in frame balanced by repulsive forces.

5H25 Magnet/Electromagnet Interactions


  5H25.10Tangent galvanometer: Compass needle pivots in a coil.
  5H25.25Linear motor: An iron core jumps into a solenoid.

5H30 Force on Moving Charges


  5H30.10Vacuum tube with screen show cathode rays bent with a magnet.
  5H30.15Vacuum tube with screen shows cathode rays bent with a magnet.
  5H30.21E/M tube: Circular bending of an electron beam in a magnetic field.

5H40 Force on Current in Wires


  5H.40Force on current carrying wire in a magnetic field
  5H40.10Ampere's law: Currents in parallel wires attract or repel.
  5H40.30Force on a current carrying wire in a magnetic field.
  5H40.70Elementary motor: Magnet, wire and battery make a simple motor.
  5H40.71Ammeter shunt: Only a small current flows to the meter.
  5H40.71Elementary motor: Bar on rails over solenoid with core.

5H50 Torques on Coils