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The plastic rod protrljana woolen cloth or fur becomes negatively charged
Equal amounts of electric charges of opposite sign to neutralize each other. online steam tables If you are charged variously named electrometers connected to a metal wire razelektrišu, wood and plastics do not. Metals (they have free charge carriers) are conductors, a wood or plastic neprovodnici ie. insulators.
F = q E, where E is the intensity of the electric field at a point where there is electrified body. In the space around each charge online steam tables there is an electric field acting electric force to any other amount of charge that is entered in this field.
When under the influence of electrical online steam tables forces charged bodies moving the work is done. Tripod with electric pendulum (+) on a cart - trolley would be moved away from the (+) charged balls - would grow at the expense of the kinetic potential energy - the electrostatic potential energy he has electrified body entered in the electric field. For approaching trolley electrified balls must be doing work against the electric online steam tables force. On account of this work, the potential energy online steam tables of charged beads pendulum increases. Around the (+) charged balls there is an electric field and in it a positive charge that has the potential energy E p1. If you put two times larger then the charge and potential online steam tables energy is twice as high as ANAC that the ratio of the potential energy and the amount of charge is constant. The ratio is constant for a single point field and is a characteristic of this field, which is called electric potential.
The work done by the electric force when moving charge from one plate is A = Fd = QED. Since A = qU to U = Ed. Hence E = U / d, so the unit [V / m]. We can show: N / C = (J / m) / C = V / m.
The Globe has a surplus online steam tables (-) charge, which creates an electric field around it. Air molecules that are above ground are ionized under the influence of cosmic rays and educate (+) charged layer of the atmosphere - the ionosphere.
Ground layer of air that have a large amount of water vapor rise and quickly cools and water vapor condenses into droplets which disperses airflow. One is due to the friction of air molecules electrified so that the cloud are charged raindrops, snow crystals and ice particles. Sam, positively charged cloud of electrostatic induction electrify another cloud or high objects on Earth. The lower part of the cloud is negatively charged while the objects on Earth positively charged.
Other possible forms of discharge are much rarer: the form (3) about 10%, and the forms of (2) and (4) above the tall buildings and mountain tops. Discharge online steam tables cloud-cloud and cloud-to-air are also possible, but very rare occurrence. Discharges within the clouds are the most common (more than 50% of all discharges), but not of practical significance for the study.
In the eighteenth century, Benjamin Franklin was the first to connect the lightning and electrical spark as the occurrence of the same type (electrical phenomena in the atmosphere) and constructed a lightning rod - metal spike on top of the building connected to the ground conductor. A safe zone is conical in shape (R H). For larger buildings placed online steam tables more lightning rods or network.
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