REPULSION OF THE ELECTRIC CHARGES
WHAT IS IT? it's a device which shows
that charge with the same sign repel. MATERIALS: 2 parallelepidal pieces of wood;
. HOW DO YOU MAKE IT? 1. Nail the four triangular pieces of wood so that they make the footing of on off the parallelepipeds 2. Nail the second parallelepiped perpendicular to the first so theat you have an upside-dow L- shaped structura 3. Screw the iron hook into the end of the horizontal arm; ill have now an upside down L shaped structure, apply an iron hook at the end of the horizontal staff then knod the nylon thread to it using a tinfoil ball. How it works: to observe the repulsion of electric charges you have to load one plastic straw rubbed on the wool and touch delicately the ball so that will assume the charges passed. You'll seen than that when you draw up to the ball, this will be repelled by the straw. If you do the some proceding with a glass sraw the small ball will be because the glass will be electic with opposite charges.
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