In wildlife, there are many processes associated with electrical phenomena. Let's consider some of them.

Many flowers and leaves have the ability to close and open depending on the time and day. This is due to electrical signals representing an action potential. You can make the leaves close with external electrical stimuli. In addition, damage to currents occurs in many plants. Slices of leaves and stems are always negatively charged in relation to normal tissue.

If you take a lemon or an apple and cut it, and then attach two electrodes to the peel, then they will not reveal the potential difference. If one electrode is applied to the peel and the other to the inside of the pulp, then a potential difference will appear, and the galvanometer will notice the appearance of amperage.

The change in the potential of some plant tissues at the time of their destruction was investigated by the Indian scientist Bos. In particular, he connected the external and internal parts of the pea with a galvanometer. He heated a pea to a temperature of up to 60 ° C, while an electric potential of 0.5 V was recorded. The same scientist investigated the mimosa pad, which he irritated with short current pulses ...

Explain to me, is it possible to reduce energy consumption by one hour, save electricity? In any significant amounts.

As I understand it, from the fact that half a city will plunge into darkness for an hour, nuclear power plants will not burn less fuel. Well, ok, 70% of the electricity in the US is generated by thermal power plants. Are thermal power plants able to “respond” to load reduction? I am not so sure. Even if they know how to do it, what is the latency of this operation? And, the strangest thing is how quickly they can “win back” the slide.

There is another very funny moment. If citizens turn out to be quite conscious and “cut off” electricity at exactly 20:00 or even in a small interval around 20:00, then the sharply increased load on the network, which is fed by power plants with “muffled” boilers, can cause funny consequences.

If residents, for example, of the same Dubai turned off the lights every day at exactly 19:00, and turned them back on at 20:00, then the power plants (theoretically) could adapt to consumers ...

August 18th. Today I finally passed the cable through the wall adjacent to the neighbor from the corridor distribution box to the outlet in the hall. To do this, removed the old wires from the channel. To one of them fastened a cable. In general, for this I advise you to purchase a cable in PVC insulation. I took a chance without. I hooked one cable core to the cable, squeezed out the rest so that they would cling and use the pull-and-push method, and by dashes from the corridor to the hall pulled the cable in the hall.

Now I just have to drill a plug from this socket to the left at the end wall (I did not have a corner apartment and sockets on this wall). After that I will put the socket outlets, and tomorrow I will proceed with the installation of the socket group in the distribution boxes.

August 27th. All! I - an unprofessional electrician, finally managed to change the wiring! No more tripping over extension wires! Further without emotions. Today I connected the wires in the junction boxes ...

It is always interesting to observe changing phenomena, especially if you yourself are involved in the creation of these phenomena. Now we will assemble the simplest (but really working) electric motor, consisting of a power source, a magnet and a small coil of wire, which we ourselves will do.

There is a secret that will make this set of items become an electric motor; a secret that is both smart and amazingly simple. Here is what we need:

• 1.5V battery or battery.

• Holder with contacts for the battery.

• Magnet.

• 1 meter of wire with enamel insulation (diameter 0.8-1 mm).

• 0.3 meters of bare wire (diameter 0.8-1 mm).

We will start by winding the coil, the part of the electric motor that will rotate. We will start by winding the coil, that part of the electric motor that will rotate. To make the coil sufficiently smooth and round, wrap it on a suitable cylindrical frame, for example, on a AA size battery ....

In 1996, engineer Roy Kuennen struggled to solve one problem: how to make Amway Corp a household water purifier. didn't break? The filter killed the bacteria with an ultraviolet lamp, but for this it had to be immersed in water. The wires that supplied the lamp with electricity rusted. Then engineer Kuennen had a crazy idea: remove the wires and feed the lamp remotely - using a magnetic coil.
While Kyuennen was tormented with a water filter, the wireless revolution was already in full swing - starting in the 90s, she gave us a cell phone, Bluetooth and Wi-Fi, but only in recent years began to cover the area of ​​power supply. Several companies are now looking for ways to supply electricity to mobile phones, PDAs, laptops and other gadgets directly, without the need to connect them to the network.

The first such products have already entered the market - for example, the charging "mat" for the Motorola Razr phone, developed by WildCharge. It does not consume much energy, as it comes in direct contact with the phone itself. However, the initial idea of ​​Kyuennen - to charge devices remotely - this does not correspond. 12 years after his experience with a filter for water purification, he is ready to introduce a truly contactless charging technology into everyday life.
Kuennen used the old idea of ​​energy transfer through a magnetic field, voiced by Faraday and Tesla. The current passing through the wire spiral creates an electromagnetic field; under the influence of this field in another spiral located nearby, a current also appears. Fulton Innovation, co-founded by Kyuennen, may launch a device this year that charges various gadgets with a magnetic coil hidden under a desk or other surface ...

At the end of the 19th century, the discovery that electricity could be used to make a light bulb glow caused an explosion of research aimed at finding the best way to transmit electricity.

At the head of the race was the famous physicist and inventor Nikola Tesla, who developed a grandiose project. Unable to believe in the reality of creating a colossal network of wires covering all cities, streets, buildings and rooms, Tesla came to the conclusion that the only feasible transmission method is wireless. He designed a tower approximately 57 meters high, which was supposed to transmit energy over a distance of many kilometers, and even began to build it on Long Island. A series of experiments was carried out, but the lack of money did not allow the completion of the tower. The idea of ​​transmitting energy by air was scattered as soon as it turned out that industry was able to develop and implement a wired infrastructure.
And now, several years ago, associate professor of the Department of Physics at the Massachusetts Institute of Technology (MIT), Marin Soljačić, was awakened from a sweet sleep by the insistent cries of a mobile phone. “The phone didn’t stop, demanding that I set it to charge,” says Soljacic.Tired and not about to get up, he began to dream that the phone, being at home, begin to charge on its own ...

It would seem that in such an area as the wiring of sockets and switches, there can be nothing new. However, this is not so. The technology of their installation and the design itself are being improved. For flush mounting, they are installed in universal mounting boxes, made mainly of plastic. On the back of the box are easily removable plugs designed to enter wires of various diameters and tubes protecting them.

Boxes designed for installation in hollow walls are equipped with special fixing screws with tabs that can fix the product on the front surface of the wall made of any material from 1 to 35 mm thick. The holes for the boxes in the hollow walls are drilled using a special nozzle, the diameter of the cutting part of which is equal to the diameter of the box. The standard diameter is 68 mm.

If the mounting boxes are installed in stone and concrete walls, they are connected to them through channels in wall panels or through flexible plastic corrugated pipes laid in strobes. The box itself is usually fixed in the wall opening with gypsum, cement-sand mortar or special glue ...

In 1892 in London, and a year later in Philadelphia, a well-known inventor, a Serb by nationality, Nikola Tesla demonstrated the transmission of electricity through a single wire.

How he did this remains a mystery. Some of his records have not yet been decrypted, another part has burned down.

The sensationalism of Tesla's experiments is obvious to any electrician: after all, for the current to go through the wires, they must be a closed loop. And then suddenly - one ungrounded wire!

But, I think, modern electricians will have to be even more surprised when they find out that a person works in our country who also found a way to transfer electricity through one open wire ...

In the United States, the end of the world was already - in August 2003. It all started on August 14, at 16:10 Eastern time, the same for parts of the USA and Canada. It was at this hour that the recording instruments in the energy ring surrounding Lake Erie (one of the five Great Lakes) recorded the first deviation from the norm: three power lines in northern Ohio failed. In the next three minutes, voltage was removed from several dozen lines, 21 power plants were decommissioned, and the vast territory that covered part of North America, including pieces of the USA and Canada, was left without electricity. According to various estimates, from 30 to 50 million people were in the disaster area. The Western press unanimously dubbed the incident "the largest energy accident in the history of North America."

America really still did not know anything similar in scale. Huge traffic jams (traffic lights do not work), metro that got up, stopped plants, factories, shops, quiet offices.Canceled and delayed departures from all civilian airports in the disaster area ...

This example is the answer to those who think that automation is something complicated and terribly expensive. A socket with a built-in motion and light sensor for $ 25 will allow you to comfortably enter the garage, pantry and other office space. And you do not have to worry about turning it on or off. The result is ease of use and energy savings.

This device allows you to change the level of illumination at which the light will turn on, the viewing angle of the motion sensor (you can get a maximum of 360 degrees) and the duration of the on (from 5 to 100 seconds). The socket is compatible with incandescent lamps up to 60 watts, and also supports economical 20-watt bulbs.

The most powerful electric current
The most powerful electric current was generated at the Los Alamos Science Laboratory, New Mexico, USA. With a simultaneous discharge of 4032 capacitors, combined into a Zeus supercapacitor, within a few microseconds, they give twice as much electric current than that generated by all the power plants of the Earth.

Highest voltage
On May 17, 1979, at the National Electrostatics Corporation, Oak Ridge, Tennessee, USA, the highest electric potential difference was obtained in the laboratory. It amounted to 32 ± 1.5 million V.