Magnetism and an electricity. Power lines

you are: Magnetism and an electricity

The basis of the modern theory which now carries the electrostatics name consists In it.

The Big role in creation of this theory the device (Franklin used him) which name lejdenskoj bankoj has played. It has been opened - opened, instead of invented, - in 1745 German physicist Evaldom George Klejstom (1700-1748). Klejst has entered a nail into a medical bottle in which was a few mercury, and has found out that it can contain an electricity considerable quantity. ' If I touched with a finger a nail when he elektrizovalsja, - wrote the scientist, - that I received blow which gave the creeps all hand and a shoulder '.

Franklin has proved in order that charges on facings lejdenskoj banks are equal each other, but are opposite on a sign. There is it thus: the electric charge transferred to an internal facing banks, influences through glass an external facing, as though pushing out its part identical (in relation to an internal facing) electric charges on a conductor to the earth.

After rassoedinenija with the earth the external facing is charged negatively. Franklin has entered the designation of two opposite electric conditions of the charged bodies standard now signs + and-. Franklin discharged lejdenskuju to bank and led to its initial condition by means of partial moving of charges from one facing on another, or through short circuit of facings. Observing during experiences slipping sparks, Franklin has put forward the assumption that the similar phenomena occur in the nature. About electric character of a lightning it has presented the sights to 1750 to the London Royal Society which, however, has not published this message, having counted its frivolous.

Despite it, Franklin has spent a number of experiences with kites, proving that the electric charges which are flowing down from storm clouds on a damp cord, can charge lejdenskuju to bank. Without being limited to the proof of existence of an atmospheric electricity, Franklin has offered an effective remedy of protection against a lightning discharge by means of a conductor which would reduce charges of an atmospheric electricity in the earth, that is a simple lightning rod.