https://padlet.com/fgaeta06/t1lief9egtj1 Made by Gaeta en-us 2018-02-16 20:54:08 UTC 2018-04-09 09:16:19 UTC hello@padlet.com fgaeta06 https://padlet.com/fgaeta06/t1lief9egtj1/wish/232513700 The natural phenomenon of static electricity has been known since antiquity.
It was recorded by Thales of Miletus in the sixth century.
-In the late eighteenth century, scientists developed an instrument for detecting "electrification", also known as ELECROSTATIC CHARGE IMBALANCE.]]> 2018-02-16 20:56:34 UTC https://padlet.com/fgaeta06/t1lief9egtj1/wish/232513700 fgaeta06 https://padlet.com/fgaeta06/t1lief9egtj1/wish/232514817 The phenomenon of electrification by contact, was quickly discovered.
When two objects were touched together, sometimes the objects became spontaneously charged.
One object developed a net negative charge while the other developed an equal and opposite positive charge]]> 2018-02-16 21:01:17 UTC https://padlet.com/fgaeta06/t1lief9egtj1/wish/232514817 fgaeta06 https://padlet.com/fgaeta06/t1lief9egtj1/wish/232515490 What's an electric charge? It is the physical property of matter that causes it to experience a force when placed in an electromagnetic field.]]> 2018-02-16 21:04:33 UTC https://padlet.com/fgaeta06/t1lief9egtj1/wish/232515490 fgaeta06 https://padlet.com/fgaeta06/t1lief9egtj1/wish/232515915 It is a method used to charge an object without actually touching the object to any other charged object.]]> 2018-02-16 21:07:13 UTC https://padlet.com/fgaeta06/t1lief9egtj1/wish/232515915 fgaeta06 https://padlet.com/fgaeta06/t1lief9egtj1/wish/232516351 To explain the process of charging by contact, we will first consider the case of using a negative charged metal sphere to charge a neutral needle electroscope.
A negatively charged metale sphere has an excess of electrons; those electrons find each other repulsive and distance themselves from each other as far as possible.
The perimeter of the sphere is the extreme to which they can go.]]> 2018-02-16 21:09:43 UTC https://padlet.com/fgaeta06/t1lief9egtj1/wish/232516351 fgaeta06 https://padlet.com/fgaeta06/t1lief9egtj1/wish/232518254 There are two types of electric charges: positive and negative. An object with absence of net charge is considered as neutral.]]> 2018-02-16 21:19:33 UTC https://padlet.com/fgaeta06/t1lief9egtj1/wish/232518254 fgaeta06 https://padlet.com/fgaeta06/t1lief9egtj1/wish/232518783 The first electroscope (called Versorium) was invented by a british physician William Gilbert around 1600. The pith-ball electroscope and the gold-left electroscope are two classical types of electroscope that are still used in physics education to demonstrate the principles of electrostatics.]]> 2018-02-16 21:22:39 UTC https://padlet.com/fgaeta06/t1lief9egtj1/wish/232518783 fgaeta06 https://padlet.com/fgaeta06/t1lief9egtj1/wish/232520267 It was invented by a british schoolmaster and physicist Joghn Canton in 1754, consists of a small ball of lightweight nonconductive substance, originally a spongy plant material called pith. The ball is suspended by a silk thread from the hook of an insulated stand.
The object is brought near to the  uncharged pith ball in order to test the presence of a charge on an object.
if the object is charged, the ball will be attracted to it.]]> 2018-02-16 21:31:08 UTC https://padlet.com/fgaeta06/t1lief9egtj1/wish/232520267 fgaeta06 https://padlet.com/fgaeta06/t1lief9egtj1/wish/232521442 It was developed in 1787 by a british physicist called Abraham bennet.
It consists on a vertical metal rod, usually bross, from the end of which hang two parallel strips of thin flexible gold leaf.

]]> 2018-02-16 21:38:51 UTC https://padlet.com/fgaeta06/t1lief9egtj1/wish/232521442 fgaeta06 https://padlet.com/fgaeta06/t1lief9egtj1/wish/232522484 2018-02-16 21:43:36 UTC https://padlet.com/fgaeta06/t1lief9egtj1/wish/232522484 fgaeta06 https://padlet.com/fgaeta06/t1lief9egtj1/wish/232522655 They are materials that permit electrons to flow from particle to particle.
The charge can be transferred to the entire surface of the object if the object is made of conducting materials.
It's is possible thanks to the electrons' movement.the charged conductor can even transfer its charge to another object with a touch.]]> 2018-02-16 21:44:31 UTC https://padlet.com/fgaeta06/t1lief9egtj1/wish/232522655 fgaeta06 https://padlet.com/fgaeta06/t1lief9egtj1/wish/232524050 They are materials that impede the free flow of electrons from atom to atom and molecule to molecule.
If charge is transferred to an insulator, the excess charge will remain at the initial location of charging.
The particles of the insulator doesn't permit the free flow of electrons; then charge is distributed on the surface od an insulator. Insulators don't transfer charge, they only have a role in electrostatic experiments and demonstrations.
Most non-metallic solids are good insulators (plastics, wood, glass...).]]> 2018-02-16 21:52:19 UTC https://padlet.com/fgaeta06/t1lief9egtj1/wish/232524050