Electricity and Magnetism

Producing Static Charge	5A10.10 Charged rods Charged rods touch an electroscope. 5A10.21 Electrophorus A square of pvc or acrlic is rubbed and contacted by a metal plate. 5A10.35 Conservation of charge Show equal and opposite charges.
Coulomb's Law	5A20.10 Rods and pivots Charged rods on a pivot are repelled or attracted. 5A20.20 Pith balls Pith balls are suspended and a charge is put in place.
Electrostatic Meters	5A22.10 Leybold electroscope An electroscope with a verticle needle. 5A22.30 Foil leaf electroscope An electroscope with a two hanging foil leaves. 5A22.71 Pasco electrometer An electrometer with a meter for the overhead. 5A22.72 Pasco overhead electroscope A horizontal electroscope is placed on the overhead. 5A22.80 Klinger/Leybold electrometer amplifier A high impedance buffer with unity gain for a voltmeter.
Conductors and Insulators	5A30.20 Conductor insulator semiconductor Doped glass is heated to change resistance.
Induced Charge	5A40.10 Charge by induction A charged rod is put close to an electroscope. 5A40.22 Balloon on a wall A balloon is rubbed placed onto a verticle wall. 5A40.24 Electric soap bubbles Blow soap bubbles at a charged Van de Graaf generator. 5A40.30 2 X 4 on a pivot A length of 2X4 lumber rotates on a pivot. 5A40.35 Metal rod on a pivot A metal rod on a pivot is attracted by both neagtive and positive charges.
Electrostatic Machines	5A50.10 Wimshurst Crank a generator and produce a charge. 5A50.30 Van de Graaff A rubber belt rubs over a felt pulley and deposits a charge onto a dome. 5A50.50 Franklin's Wheel Charges on the tips of needles force a wheel to spin.
Electric Field	5B10.10 Hair on end Stand on a stool and charge yourself. 5B10.25 Foam Peanuts Styrofoam peanuts are placed in a uniform electric field. 5B10.40 Grass Seed Electric Field Lines Grass seed is lined up by an applied electric field. 5B10.25 Torque on a dipole Styrofoam peanuts are placed in a uniform electric field.
Gauss's Law	5B20.15 Gauss's Law Charge is on the outside of a conductor. 5B20.30 Charged Mylar Balloons Charge is put onto two helium filled balloons. 5B20.35 Radio in a cage A radio is placed in a faraday cage.
Electrostatic Potential	5B30.35 Point and Sphere Discharge a Van de Graff with a needle or a sphere.
Capacitors	5C10.10 Sample Capacitors A variety of capacitor energies, voltages and capacitances. 5C10.20 Demonstration Capacitor Vary the spacing of a parallel plate capacitor.
Dielectrics	5C20.33 Torque on a Dipole An electric dipole undergoes a torque by an external electric field.
Energy Stored in a Capacitor	5C30.20 Discharge a Capacitor A large capacitor is shorted with a nail. 5C30.30 Energy in a Cap A capacitor is discharged through a motor that lifts a weight.
Resistivity and Temperature	5D10.15 Resistance Current is varied across a resistor to shows Ohm's Law. 5D20.10 Resistance at low temperature A coil of wire is immersed in liquid nitrogen. 5D20.55 Zero Resistance Cool a Hi-Tc superconductor and measure the resistance. 5D20.60 Conductivity in Glass Heat glass until it is hot enough to sustain a current.
Cells and Batteries	5E40.25 Lemon Battery Zinc and copper inserted into a lemon. 5E40.xx Fuel Cell A hydrogen Fuel Cell powers a fan motor.
Ohm's Law	5F10.20 Voltage drop along a wire A slider with a lamp becomes dimmed when the elongated.
Circuit Analysis	5F20.49 Simple circuits Basic series and parallel circuits with lamps. 5F20.50 Circuit Puzzler Combination series and parallel circuit with lamps.
RC Circuits	5F30.20 RC charge curve Show the voltage curve for a charging capacitor. 5F30.60 Neon relaxation oscillator A neon lamp repeatedly flashes with the RC time rate to discharge a cap.
Magnets	5G10.10 Lodestone Natural lodestone holds a magnetic field. 5G10.11 Magnets through your hand A pair of strong neodymium iron boron act through the hand.
Magnet Domains	5G20.20 Magnetic Domains The magnetic domains within a material are viewed. 5G20.30 Paramagnetism and Diamagnetism The properties of paramagnetic and diamagnetic materials are shown.
Temperature and Magnetism	5G50.10 Curie Point Iron loses its magnetic attraction when heated. 5G50.50 Meissner Effect Cool a superconductor with LN and levitate a permanent magnet.
Magnetic Fields	5H30.30 Iron filings Iron filings show the dipole field arrangement on the OHD. 5H30.61 Magnetic Shielding Mu metal is used to show shielding.
Field and Currents	5H15.10 Magnetic Field around a wire Show the magnetic field surrounding a long wire. 5H15.40 Solenoid and filings Show the magnetic field around a solenoid. 5H15.47 Long solenoid Show the magnetic field inside and outside. 5H15.50 Field around a toroid Show the field around a toroid with a compass.
Forces on Magnets	5H20.10 Two magnets on pivots One magnet attracts or repels another magnet.
Magnet and Electromagnet	5H25.10 Magnet and electromagnet Iron filings show that the field of a bar magnet and an electromagnet are similar. 5H25.11 Pick up nails Iron nails are similarly attracted to both a permanet bar magnet and an electromagnet
Force on a Moving Charge	5H30.10 Cathode ray tube An electron beam is deflected by a magnet.
Force on a Current	5H40.10 Parallel current wires A pair of current wires are attracted or repelled. 5H40.30 Jumping wire A current wire is deflected by a magnet
Torque on a current loop	5H50.20 Torque on a loop A current loop shows a torque in a magnetic field. 5H50.30 Flipping loop A current loop is OK or not OK depending on direction.
Self Inductance	5J10.23 Back EMF One half of an AC neon bulb is made to flash
LR Circuits	5J20.20 RL Circuit A lamp in series with a coil.
RLC Circuits (DC)	5J30.10 Ringing in a tank circuit A tank circuit is hit with a slow square wave and the ringing is shown on a scope.
Induced Currents	5K10.20 Coil, magnet and galvo A magnet is moved in and out of a coil. 5K10.80 Homopolar Motor A conductor moves in a B field 5K10.90 Can Smasher A rapidly changing magnetic field crushes a Coke can.
Eddy Currents	5K20.10 Eddy Current Pendulum A magnet is dropped into a tube. 5K20.25 Nib in Tube A magnet is dropped into a tube. 5K20.30 Jumping ring A magnet is dropped into a tube. 5K20.42 Arago's Disk A magnet pivoted above a spinning disk will rotate. 5K20.60 Barlow's Wheel A copper disk is rotated between the poles of a strong magnet.
Transformers	5K30.50 Jacob's Ladder A step up transformer creates a climbing arc. 5K30.51 Primary and Secondary A transformer secondary has the the load removed from the primary.
Motors and Generators	5K40.10 DC Motor A current loop rotates in a magnetic field.
Impedance	5L10.10 Inductive Reactance An RL circuit is driven with a sine wave. 5L10.30 Capacitive Reactance An RC circuit is driven with a sine wave.
RLC Circuit (AC)	5L20.10 RLC circuits An RLC circuit is driven with a sine wave.
Semiconductors	5M10.10 Hall Effect A Hall probe. 5M10.60 PN junction photocell Light on a photocell powers a fan. 5M10.63 Semiconductors A white light shines on a slice of doped silicon that is connected to an ohmmeter.
Tubes	5M20.33 Vacuum Tubes A vacuum tube diode.
Transmission Lines and Antennas	5N10.10 Sample Transmission Line A section of coaxial cable. 5N10.55 Standing Waves A Microwave transmitter is reflected off an adjustable plate and received by an antenna. 5N10.60 RF Transmitter and receiver A 100 MHz tank circuit transmitter is received by an antenna.
Tesla Coil	5N20.40 Tesla Coil A tank circuit transmitter shows high frequency and high voltage.
Electromagnetic Spectrum	5N30.10 Projected Spectrum White light is refracted by a prism

This web page was last updated on 6/14/07. Please e-mail your comments or suggestions to Gerald_Zani@brown.edu