Conductors and Insulators

When an eccentric inventor tries to levitate by first placing a large negative charge on himself and then putting a large positive charge on the ceiling of his workshop. When he attempting to place a large negative charge on himself, his clothes fly off. The excess electrons on him repel each other. They move to his extremities, including his clothes and the repulsion carries the clothes off with the electrons.

When two positively charged objects are brought near each other, a similar repulsive force is produced. ... When a negatively charged object is brought near the knob of a neutral electroscope, the negative charge repels the electrons in the knob, and those electrons move down the stem into the leaves.

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When the positive rod is placed close to this neutral dust, the natural equilibrium is upset so a charge unbalance is forced within the dust particles, such that their sides facing the glass rod will become more negative and that of the sides opposing the glass rod will become positive. The dust particles become polarized. But their overall electrical neutrality holds as long as they do not come into physical contact with either the rod or the silk. In turn, this negative electrical charge in the side facing the rod will be attracted to the positive rod with greater force than the repulsion force which appears between the two positives.

A car always attracts dust right after it is polished because, buffing, rubbing, and polishing, all create a charged surface which attracts small, opposingly charged pieces of dust and debris floating in the air.

If a negative object is used to charge a neutral object, then both objects become charged negatively. In order for the neutral sphere to become negative, it must gain electrons from the negatively charged rod. A neutral metal sphere is touched by a positively charged metal rod. This process is called Charging By Conduction.

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Grounding is a principle of electricity. The grounding system is a "backup" pathway that provides an alternate route for electrical current to follow back to "ground" in the case of a problem in the wiring system. Grounding is the process of removing the excess charge on an object by means of the transfer of electrons between it and another object of substantial size. When a charged object is grounded, the excess charge is balanced by the transfer of electrons between the charged object and a ground. An insulator holds charge within its atomic structure. Objects with like charges repel each other, while those with unlike charges attract each other. A conducting object is said to be grounded if it is connected to the Earth through a conductor.


*Eccentric inventor- tending to act in strange or unusual ways.

*Repulsive Force- force by which bodies repel one another.

*Electroscope- an instrument for detecting and measuring electricity, especially as an indication of the ionization of air by radio activity.

*Positive Rod- a group of rod-shaped bacterial cells that appears violet through Gram's method. Supplement.

*Negative Rod- Gram-negative bacteria lose the crystal violent stain and turn red through Gram's method.

*Polarized- restrict the vibrations of wholly or partially to one direction.

*Conduction- the process by which heat or electricity is directly transmitted through a substance when there is a difference of temperature or of electrical potential between adjoining regions, without movement of the material.

*Insulator- a substance which does not readily allow the passage of heat or sound.


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