a negative charge
he rubbed amber and it could pick up pieces of sticks, fur, wool or straw!
When glass is rubbed, it tends to acquire a negative charge. This is due to the transfer of electrons from the material it is rubbed against to the glass, causing an imbalance in charge and resulting in a negative charge on the glass.
The ancient Greek scientist who discovered this phenomenon was Thales of Miletus. He observed that amber could generate static electricity when rubbed with fur, leading to the attraction of light objects like feathers and straws.
When a balloon is rubbed on your hair, electrons are transferred from your hair to the balloon, giving the balloon a negative charge and your hair a positive charge. This results in an overall negative net charge on the balloon.
a negative charge
Friction strips electrons so the rubbed amber would take on a negative charge. Actually, friction causes charges to shift. Charges are indeed stripped from something, but they are collected up by something else. Amber does, indeed, become negatively charged by rubbing it with, say, fur. The phenomon is called triboelectric effect. And a link is provided.
when amber is rubbed with silk cloth +ve charge comes on silk cloth and -ve on amber due to interaction between their molecules, so is that when we comb our hairs , then -ve charge comes on comb and +ve on hairs,so when we bring silk cloth near the comb they attract each other due to 'ving opposite charges
Amber
Thales of Miletus, a Greek philosopher, discovered that rubbing amber with silk created an electric charge in the amber which caused objects to be attracted to it. If rubbed enough, it created a spark, much like we receive when we walk on carpet and touch a doorknob and see, hear and feel the spark.
he rubbed amber and it could pick up pieces of sticks, fur, wool or straw!
The earliest known records describing electric charge involve the use of amber, a fossilized tree resin. Thales of Miletus, a Greek philosopher from around 600 BC, was among the first to document that amber could attract lightweight objects when rubbed.
Not all objects became electrified, objects "electrified" by the same machine appeared to repel each other (like magnets of the same charge); and objects "electrified" in different ways (one by touching an electric machine, for example, and the other, say, by rubbing amber) would attract each other (like magnets of opposite charge).
When Thales rubbed amber with silk, he observed that the amber attracted small objects like feathers and hair. This phenomenon is known as static electricity, where the friction between the amber and silk causes the transfer of electrons, giving the amber a temporary charged property.
When glass is rubbed, it tends to acquire a negative charge. This is due to the transfer of electrons from the material it is rubbed against to the glass, causing an imbalance in charge and resulting in a negative charge on the glass.
The Greeks studied charges using amber, which is a type of fossilized tree resin that can acquire a static electric charge when rubbed. This observation led to the development of early theories on electricity and magnetism in ancient Greece.
The ancient Greek scientist who discovered this phenomenon was Thales of Miletus. He observed that amber could generate static electricity when rubbed with fur, leading to the attraction of light objects like feathers and straws.