Science Project on “A Hanging Pencil”, Project Experiment Topics on Electricity, Magnetism Gravity for Class 8, 9, 10 and 12 Students.
A Hanging Pencil
Materials Required:
- A pencil that has metal on the eraser
- A plastic cup with opaque sides
- A small magnet
Hide a small magnet between your fingers and hold a plastic cup in the same hand. Having done so, turn the plastic cup upside down.
With the other hand, insert the eraser end of the pencil into the cup.
The pencil should be placed on the side, where the magnet is concealed. Now remove the hand that was holding the pencil.
The pencil will continue to dangle. But you need to ensure that the magnet lies on the side of the cup, where it cannot be seen.
You can now remove the pencil and put the cup and the pencil on the table, even as you surreptitiously remove the magnet.
Those watching the trick are free to examine the cup and the pencil.
They will not be able to unravel the mystery. The cup can be replaced with a cardboard tube, if required.
In reality the magnet attracts the metal band, on top of the pencil.
This is what keeps the pencil suspended, seemingly in midair. Since the cup is made of plastic, the pull effect of the magnet goes through the plastic cup and holds the pencil in place.
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