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1 -a = When you charge a metal rod by friction, the rod gets extra electrons. But since you are connected to the rod, the extra electrons that the rod got are transferred to you. You are then connected to the earth which is one big grounder. In the end, the charges of the rod are transferred to you,which is then transferred to the earth.
2 -An electroscope is an early scientific instrument that is used to detect the presence and magnitude of electric charge on a body. It was the first electrical measuring instrument. The first electroscope, a pivoted needle called the versorium, was invented by British physician William Gilbert around 1600.[1] The pith-ball electroscope and the gold-leaf electroscope are two classical types of electroscope that are still used in physics education to demonstrate the principles of electrostatics. A type of electroscope is also used in the quartz fiber radiation dosimeter. Electroscopes were used by the Austrian scientist Victor Hess in the discovery of cosmic rays.
3-Excesss charges are rejected from any body as they try to stay neutral, a conductive body have their electrons free to move then they will be forced by the field to concentrate where their presence is needed and away from where they bother each other, as a result the surface get charged becoming an equipotential surface (otherwise charges will moves following the potential gradient).
2 -An electroscope is an early scientific instrument that is used to detect the presence and magnitude of electric charge on a body. It was the first electrical measuring instrument. The first electroscope, a pivoted needle called the versorium, was invented by British physician William Gilbert around 1600.[1] The pith-ball electroscope and the gold-leaf electroscope are two classical types of electroscope that are still used in physics education to demonstrate the principles of electrostatics. A type of electroscope is also used in the quartz fiber radiation dosimeter. Electroscopes were used by the Austrian scientist Victor Hess in the discovery of cosmic rays.
3-Excesss charges are rejected from any body as they try to stay neutral, a conductive body have their electrons free to move then they will be forced by the field to concentrate where their presence is needed and away from where they bother each other, as a result the surface get charged becoming an equipotential surface (otherwise charges will moves following the potential gradient).
koraniriya:
Wt about the third one
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