E&M

Resistivity

Purpose: Illustrate how the resistivity of a wire changes with length and gauge. Parts: Wire set up Demo multi meter Power supply unit Cables Setup: The wire setup contains two wires with same length but different wire gauges.  Connect the power supply through different lengths of each… Continue reading »

Current and Resistance

Purpose:Visualize electric current. Parts: Wooden tray with nails in it Metal hanger to hold the tray Steel balls Setup: Attach one end of the tray to the hanger and place it as shown in picture 3, so that the tray will have some incline with table. Now release… Continue reading »

Cathode Ray Tube

Purpose: Demonstrate the force of a magnetic field on a moving charged particle(Right hand Rule). Parts: Cathode ray tube w/ stand Power supply unit for CRT Cables Setup: Connect the positive and negative leads from the power supply to the tube as shown in the pictures. Increase the… Continue reading »

Induction

Purpose:Illustrate phase difference between  current in the solenoid and the induced voltage. Parts: Coil set up w Iron bar Function Generator 10 ohms resistor Demo Oscilloscope Cable Setup: Channel 1 shows the current through the primary coil(voltage across the 10 ohms resistor) and channel… Continue reading »

Magnetic Field Lines-2

Purpose: Illustrate magnetic field lines. Parts: Magnetic stick attached to a glass sheet placed on a glass tray. Iron filings. Setup: Drop some iron fillings on the glass sheet and give a little knock on to the sheet. Iron fillings will nicely arrange along the… Continue reading »

Metal Detector

Purpose: Real time application of Eddy currents/ Induction. Parts: Metal Detector with its instruction manual. Metal detector is in the demonstration prep room ( TPL 202). Setup:… Continue reading »

Eddy currents and Magnetic Damping

Purpose:Describes the magnitude and the direction of the drag, called magnetic damping produced from Eddy currents. Parts: Magnetic damping setup (Including Al saw , Al and Cu rings) Setup: Plug the setup to the wall outlet and set the voltage to its maximum. Then increase the current all the… Continue reading »

Transformer

Purpose: Demonstrate the functioning of step up and step down transformers. Parts: Power supply Demo multi-meter for primary coil Demo multi-meter for secondary coil Coils with metal core Cables Setup: Connect the Variac power supply to the wall outlet and primary coil to the power… Continue reading »

Motor/Generator Demonstration

Purpose: Illustrate the operation of generators and motors using electromagnetism. Parts: Magnetic Generator setup Power supply Unit Galvanometer Setup: Connect the set up to the power supply as shown in the pictures to see how it works as a motor. When the power is… Continue reading »

Ring Launchers

Purpose: This is a demonstration of electromagnetic induction. Parts : Small ring launcher with two rings and bulb setup Big launcher with rings (one plastic, two metal: one ring and one split ring) and plastic tube Setup : The small ring launcher accessories set includes a small coil… Continue reading »

Fleming’s Left-Hand Rule-2

Purpose:  This demonstration illustrates Fleming’s Left Hand Rule. Parts: Power supply Unit Cables Horseshoe Magnet Setup: If you pass a current through the wire it moves upward due to the force acting on it according to the Fleming’s left-hand rule. ( Please note that black lead is connected to the positive… Continue reading »

Fleming’s Left-Hand Rule-1

Purpose: Illustrate Fleming’s Left handed Rule. Parts: Magnetic Force Accelerator and metal rods Power supply Unit Banana cables/ crocodile clips Setup:   The metal rod rolls to the left once you apply a voltage to the Magnetic Force Accelerator. Current loop… Continue reading »

Magnetic Field Lines-1

Purpose: Demonstrates the magnetic field lines surrounding different coil configurations. Parts : Power Supply Unit Coil arrangement Small compasses Iron filling Setup: Switch on the power supply, Put some Iron filling on the glass/plastic sheet near the two… Continue reading »

Electric Field Lines

Purpose: Demonstrate Electric field lines for different electrodes. Parts: Sealed container with oil and suspended particles Electrostatic generator with cables Electrode plates   Setup: Place an electrode plate in the holder above the tank. Invert the tank to re-suspend… Continue reading »

RC circuits

  Purpose: Demonstrate the phase difference between the current and the voltage across the capacitor in  a series RC circuit. Parts: Demo oscilloscope Signal Generator Breadboard/few capacitors/Resistor BNC cables Setup:   Schematic(above) and the circuit on the breadboard(below). Continue reading »

Capacitance of a parallel plate capacitor

Purpose: Demonstrate the variation of capacitance with distance and the material in between the plates. Parts: Slidable big parallel plate capacitor High Impedance Voltmeter Sheet of glass Piece if rabbit fur LabQuest interface box to Project voltmeter to the big screen… Continue reading »

Charging/Discharging of a Capacitor

  Purpose: Demonstrates the charging of the capacitor when it is connected to the battery(Photo 1), and discharging through the bulb so that the bulb lights up when the switch is open(Photo 2).   Parts: Capacitor & switch Light bulb /connectors… Continue reading »

“Levitron”

Purpose To illustrate how “levitation” may be achieved through magnetic fields Parts The device and accessories are found on shelf M3 Setup Plug in and turn on the “Levitron” base. Spin top on top of base; it should levitate. Continue reading »

Faraday’s bulb

Purpose To illustrate Faraday’s law; current induced by putting magnet through coil lights up bulb Parts All found on shelf M2 Faraday’s bulb contraption Magnet Set up Pull magnet through loop and watch bulb light up… Continue reading »

Large Van de Graaff generator

Purpose To illustrate various concepts of electrostatics Parts The generator is found to the east of shelf M Set up Plug  in and turn on generator. Perform electrostatics demonstrations as desired. Continue reading »

Projector electroscope

Parts Electroscope, capable of detecting electrostatic charge when charged object is touched to the black protruding knob. May be placed on projector, allowing many people to view comfortably at once. Found on shelf M1… Continue reading »

Faraday’s law demo

Purpose To illustrate the principle of induction. Parts The meter/coil contraption is found fully-assembled on shelf M1 If a magnet is needed, some are found on shelf M1 Set up Pull magnet through the various wire loops and note the reading on the meter. Continue reading »

Build a speaker

Purpose  To illustrate Faraday’s law through a hands-on project. Parts Several kits in zip bags are found in a box on shelf L1 Set up Follow the written instructions found in the box to build the speakers. Continue reading »

Dynamo bike

Purpose To illustrate Faraday’s law, as well as to show how mechanical energy can be converted to electrical energy Parts Dynamo bike, found in the southeast corner of the demonstrations room Set up No setup required. Simply sit on the bike and pedal, watching attached light… Continue reading »