PDF chapter test TRY NOW
How steady is your hand?
Materials required:
A cell, an electric bulb, a metal key, two iron nails (about \(5\ cm\) in length), about one and a half metre long thick metal wire (with its plastic insulation scraped off ) and few pieces of connecting wires.
Procedure:
- Fix two nails nearly one metre apart on a wooden board so that these can be used as a hook.
- Fix the wire between the nails after inserting it through the loop of the key.
- Connect one end of this wire to a bulb and a cell.
- Connect the other terminal of the cell to the key with a wire.
- Ask your friend to move the loop along the straight wire without touching it.
What will happen when the loop of the key touched the wire?
The bulb indicating the loop of the key has touched the wire. It is because the key is a good of electricity.
Register for free to see more content