Magnetic field

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 »


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 »


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 »


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 »