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KVD Technologies Physics Exhibits Bed of Nails Bernoulli Blower Demonstrator Burping Whirl Cartesian Diver Colour Generator Crazy Magnets Eddington Boomer Electro Magnet Rotating Field Floating Galileo Pendulum Induction Jacobs Ladder Lenz Law Needles Coil


KVD Technologies Physics Exhibits Bernoulli's Demonstrator

Bernoulli's Demonstrator


Demonstrates the lift force of air.

KVD Technologies Physics Exhibits Burping Whirl

Burping Whirl


Demonstrates the principle of how a black hole bends time and space.

Crazy Magnets


Illustrates the principle of magnetism — opposites attract and similar repels.

KVD Technologies Physics Exhibits Crazy Magnets
KVD Technologies Physics Exhibits Bernoulli's Blower

Bernoulli's Blower


This Exhibit demonstrates Bernoulli’s Equation. A strong steady jet of air, created by the high powered fan and channeled through a tube, will hold a light ball in the air. This is what really happens! The stream of air, moving at a high speed through the tube has a lower pressure than the surrounding  stationary air. If the ball starts to fall, due to gravity, the difference in pressure between the top and the bottom of the ball is sufficient to keep

it in position. Even if the angle of the tube is changed the effect is the same.

KVD Technologies Physics Exhibits Colour Generator

Electro Magnet Rotating Field


By rotating the electro magnet the compasses change direction to indicate the direction of the magnetic field.

KVD Technologies Physics Exhibits Electro Magnet Rotating Field

Floating Magnets


Illustrates the principle of magnetism where devices with similar polarity repels each other resulting in the upper disk “floating”.

KVD Technologies Physics Exhibits Floating Magnets

Galileo's Pendulum


A pendulum is a weight suspended from a pivot so that it can swing freely.  When a pendulum is moved sideways from its equilibrium position, it is subject to a restoring force due to gravity that will accellerate it back towards equilibrium position.  When released, the restoring force combined with the pendulum's mass causes it to oscillate about the equilibrium position, swinging back and forth.  The time for one complete cycle, a left swing and a right swing, is called the period.  A pendulum swings with a specific period which depends (mainly) on its length.

KVD Technologies Physics Exhibits Galileo's Pendulum

Induction Demonstrator


Three exhibits in one.  One transformer is used to heat a nail becoming evident as the nail turns red.  The next transformer is used to melt wax.  The third transformer is used to levitate aluminium disks by induced eddy currents.  The aluminium disks also demonstrates Lenz’s Law.

Colour Generator


Demonstrates the effect of mixing colours.

KVD Technologies Physics Exhibits Induction Demonstrator

Jacobs Ladder


A bolt of electricity travels up two rods and creates a lightning effect.

KVD Technologies Physics Exhibits Jacobs Ladder

Magnetic Field with Needles


Needles point in the direction of magnetic field lines as the handle is turned.

KVD Technologies Physics Exhibits Magnetic Field with Needles

Lenz' Law


A piece of steel and a magnet of similar weight are placed inside identical non-magnetic aluminium tubes.  When the tubes are flipped upside-down the steel falls to the bottom with minimal resistance while the magnet travels significantly slower due to induced eddy currents.  Slots are cut in the tubes in order for the steel and the magnet to be visible.

KVD TecKVD Technologies Physics Exhibits Lenz' Law

Pumping Magnets


Illustrates how a rotating magnet can be used to attract and repel other magnets to realize a pump.

KVD Technologies Physics Exhibits Pumping Magnets

Rotating Magnets with Iron Filings


Iron filings are oriented in the magnetic field produced by rotating magnets.

KVD Technologies Physics Exhibits Rotating Magnets with Iron Filings

Rotating Electro Magnets with Compasses


By rotating the electro magnet the compasses change direction to indicate the direction of the magnetic field.

KVD Technologies Physics Exhibits Rotating Electro Magnets with Compasses

Spinning Magnets


Illustrates the principle of magnetism.  Opposites attract - similar poles repel.  This is also the principle of an electric motor.  (Rotor and Stator).

KVD Technologies Physics Exhibits Spinning Magnets

Statics Demonstrator


Illustrates the effect of static electricity on polystyrene balls.

KVD Technologies Physics Exhibits Statics Demonstrator

Steady Hand


This exhibit is to test your steady hand.  Press the white button. Try to guide the ring through the obstacle circuit without  contact between the ring and the bar. If contact takes place the siren and lights will go on. Don’t give up, try to finish the circuit.

KVD TKVD Technologies Physics Exhibits Steady Hand

Tesla Coil


A Tesla coil is a type of resonant transformer circuit that is used to produce high voltage, low current, high frequency alternating current electricity.  The generated electricity is discharged via a metal dome.

KVD Technologies Physics Exhibits Tesla Coil

Thermal Insulators and Conductors


Thermo chromic paper is a type of paper that is very sensitive to a change in temperature. When the paper is exposed to a sudden change in temperature, discolouration of the paper occurs. The change of the papers colour depends on the affected area and the temperature of the object that is brought into contact with the thermo chromic paper.

KVD Technologies Physics Exhibits Thermal Insulators and Conductors



A vortex is generated in a container filled with water the suction power of which is illustrated by a ball sucked down to the bottom.

KVD Technologies Physics Exhibits Vortex

Wind Tunnel with Wing


Demonstrates lift generated by aerofoil.

KVD Technologies Physics Exhibits Wind Tunnel with Wing
KVD TKVD Technologies Physics Exhibits Take a Seat

Take a Seat


This exhibit demonstrates how pressure is distributed by surfaces covered by different objects including nails, balls and pegs. 

Archimedes' Screw


Archimedes' Screw consists of a helic (or screw) inside a cylinder with both ends open.  This helical surface surrounds a central cylindrical shaft inside a hollow pipe.  The lower end of the pipe is placed under the surface of water at  a slant.  As the handle that is attached to the helix is turned small amounts of water slowly raises in the wells which is formed by the side of the cylinder and the surfaces of the helix.  This water will slide up in the spiral tube until it finally pours out at the top of the tube.  This screw was used mostly for draining water out of mines or other areas of low lying water.

KVD Technologies Physics Exhibits Archimedes Screw
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