Experiment
This experiment helps us in converting potential energy into kinetic energy. If the model is placed at the edge of a table, the weight descends slowly rotating the airplane by the string tied to the refill. On rotating the airplane by hand the string gets wound in the refill. Actually the potential energy in the weight is converted into kinetic energy.
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Testing coil resistance
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Simple Switch
This is the model of a simple switch. When we move the long metal handle to touch the metal clip, the connection between the battery and the object is made.
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Transfer Of Energy
When one of the marbles is picked up and then released, it hits the adjacent marble and this energy is passed from one marble to another till the last marble is reached. Thus the last marble jumps up with the help of the energy the first marble created.
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Galvanomter
A galvanometer is an instrument which is used to measure even the slightest of electric currents. It consists of a compass with copper wire coiled around it. It is kept such that the needle points to the north. when electric current is passed onto it, the needle swings to point in an east-west direction.
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Balloon Pump
The balloon pump consists of two film roll cases with holes in both the caps and in the bottom of one. Three valves are attached to the holes which let the air flow in one direction. So, when we bend the tube the balloon gets filled with air. But the air does not come out which makes it easy to fill the balloon.
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Wind Speed Measurer
When wind comes towards it, the refill with the thin straw begins to rotate in a clockwise direction. Just then the stopwatch is started. As it rotates, it unwinds the string and we have to stop the stopwatch just when the string is fully unwind. As the string is one meter long, we know how much the wind takes to travel 1 meter. Thus we can calculate the speed of wind.
Compass
When the whole thing is shaken, the lower part, which is a magnet turns to the direction of north
Phenakistoscope
When the disc
is rotated holding it in front of a mirror, if we see through the slits
different patterns will be seen.
Rainbow Disk
It helps us in understanding that the colour white contains all the colours of the rainbow. When the pen is rotated by hand, the colours merge and only the colour white can be seen.