You will need
- two copper plates (electrodes);
- two copper or aluminum wires;
- - voltmeter.
One of the sources of electricity are a normal telephone line. They are kept at a voltage that provides not only the performance of handsets users, but also allows you to provide incandescent lamps of low and medium power.
Another well-known way of generating electricity is making it out of wood. To do this, you'll need two small pieces of metal. When interacting with each other, these plates will form bipolar electrodes - anode and cathode. Take one of them (for example, an iron nail or aluminum rod) and insert it as deeply as possible into the tree trunk. The second galvanic cell insert 15-20 cm into the soil next to the tree. After a few seconds, between the elements will have a voltage of 1 Volt. To the voltage generated was quite good the quality, it is necessary in the tree to insert a greater number of rods.
Similarly, it is possible to obtain electricityby inserting galvanic elements in the lemon, orange and other citrus. Moreover, in this case, in addition to copper and aluminum, it is also allowed to use plates (rods) made of gold or silver, through which we can get the voltage of not one, but two volts.
On a country site it is possible to produce electricity through ordinary raw potatoes. For this, in addition to the potato tuber, you will need toothpaste, salt and wire. Take the tuber and cut it into two halves. In the centre of one of them with a teaspoon make a small indentation and put salt mixed with toothpaste, and using a different guide the stripped wire. Then connect the halves with matches, needles or toothpicks so that the cable is in contact with the toothpaste. That's it - your source of electricity ready to work. Now you can use it to include light bulbs and electric sparks to light fires.