The myths associated with electricity.
It’s been many centuries of research since, as Benjamin Franklin conducted his experiments with a kite in 1752, but still left a lot of myths about this already a familiar form of energy. In this review ten facts that everyone should know, at least for their own safety.
1. Batteries store electric charge or electrons
If you ask any person “What is a battery”, the majority answer that it stores electricity, or perhaps inside the battery “float” free electrons. However, this is far from the truth. Inside the battery is a “chemical soup”, known as an electrolyte, which is stored between the electrodes (positive and negative). When the battery is connected to the device, the electrolyte is chemically converted into ions, and the electrons are “thrown out” of the positive electrode. After that, the electrons are attracted to the negative electrode and “on the road” nourish a device connected to the battery.
2. The electric current depends on the thickness of the wire
Fairly widespread misconception about how electricity “flows” through wires – supposedly thicker wires allow more current because they have “more space for electrons and less resistance.” Intuitively this seems correct: for example, chetyrehpolozyj highway at the same time can drive more cars than on SSB. However, the electric current behaves differently. For electric current can be compared to a river: a wide river flows slowly and calmly, and in a narrow channel the flow is accelerated.
3. Electricity doesn’t weigh anything
Since you cannot see electricity with the naked eye, it is easy to assume that electricity is just energy that flows from point a to point B and has no mass or weight. In a sense, that’s true: electric current has no mass or weight. However, electricity is not just a form of invisible energy, and the flow of charged particles-electrons, each of which has mass and weight. But modern science does not allow to determine this weight, since it is negligible.
4. Electric shock low voltage is not dangerous
Receptacles and plugs are always a cause of great concern for parents raising young children, however, they did not worry, give their children the batteries to put them in their toys. After all, the only dangerous high voltage… It is fundamentally wrong. Dangerous current not voltage, and its strength (measured in amperes). In certain circumstances, even a 12-volt battery may cause serious harm or even cause death.
5. Wooden and rubber objects are good insulators
When people at home are performing any work related to electricity, they usually do rings or jewelry and put on rubber gloves and shoes. Despite the fact that it’s all good, it’s not enough to prevent an accident. If the instructions to things not otherwise stated it is more of a conductor, not an insulator. Because an insulator is pure rubber and domestic rubber footwear, gloves and other goods full of a variety of admixtures for strength and durability of these products.
6. Generators create electricity
Backup power generators – perhaps the best “thing” for a rainy day, because it “produces electricity”, without which today is simply not enough. But is it? The generator converts mechanical energy into electrical energy. When the generator is running, it causes the electrons already present in the wires and circuit, to flow through the circuit. If you were to draw a rough analogy, the heart does not create, but only pumping blood through the veins. Similarly, the generator makes it easier for electrons, but does not create them.
7. Electric current is just a flow of electrons
Although the electricity may generally be described as “the flow of electrons through a conductor” that is not entirely true. The type of flow of electric current through a conductor depends solely on the type of conductor. For example, in the case of plasma, neon lamps, fluorescent lamps and flares used an elaborate combination of protons and electrons. In other conductors, such as electrolytes, salt water, solid ice and batteries, the electric current is a flow of positive hydrogen ions.
8. Electricity moves at the speed of light
Most people are with the identities of the associated electricity with lightning and this is what causes the misconception that the electrons and the actual electric current moving at a speed close to the speed of light. While it is true that the electromagnetic wave travels along the conductor at a speed of 50 to 99 percent of the speed of light, it is important to understand that the actual electrons move very slowly, not more than a few centimeters per second.
9. Power lines are insulated
Most wires and cables in our everyday life (electric cords, chargers, lamps and other various instruments) heavily insulated rubber or plastic. But it is naive to assume that power lines are well insulated. But how do they sit on them birds? It turns out that the only reason why birds do not receive a discharge, it’s because they don’t touch the ground sitting on the cable. Isolate all air lines is too expensive.
10. Static electricity is different from “the rest” of electricity
Usually people think static electricity, which can be seen, for example, when you take off synthetic clothes, different from electric current, without which it is impossible to imagine everyday life. However, the only difference between “normal” and static electricity is that the former represents a steady stream, and the second instant adjustment. After connecting the device to a wall outlet the flow of electrons is continuous, and static electricity occurs when two conductors with different charges get closer to each other and going on a miniature arc of electricity, after which the two charges are equalized.
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