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.