You will need
- The glass, copper wire, wire, duct tape,paper clips, two square batteries.
Electromagnets are metals that are capable of magnetizing, such as Nickel, iron and so on, the motion of the currents around them. To get started, create a power source.
Take two batteries and connect them with tape. Connect the batteries so that the poles at their ends were different, that is plus opposite the minus, and Vice versa. Using clips to the end of each battery attach the wire. Next, place one of the paperclips on the top of the batteries. If the clip does not reach the center of each battery may have to unfold to the desired length. Secure the design ribbon. Make sure that the free ends of the wires and the edges of the clips reach the center of each battery. Connect the batteries at the top, do the same with the other side.
Take the copper wire. About 15 inches of wire, leave straight, then start wrapping it around the glass Cup. Make about 10 turns. Direct leave another 15 inches. Connect one of the wires from the power source to one of the open ends of the resulting copper coil. Make sure wires are well connected to each other. When connecting the circuit gives a magnetic field. Connect the other wire of the power supply with copper wire.
At that time, when through the coil is an electric current inside the metal is magnetized. Paperclips will stick together, the same metal part of the spoon or fork, the screwdriver will be magnetized and attract other metal objects, while the coil affects the current.
The coil can be hot. Make sure there are no combustible materials and be careful not to burn the skin.
The most easily magnetized metal is iron. When checking the field, do not select aluminum or copper.
Advice 2: What is the electromagnetic field
The introduction of new technologies and the widespread use of electricity led to the emergence of artificial electromagnetic fields, which often have a damaging effect on humans and the environment. These physical fields are created when there are moving charges.
The nature of the electromagnetic field
The electromagnetic field is a special kind of matter. It occurs around the conductors, which are moving electric charges. Is this force field from two separate fields, electric and magnetic, which can not exist in isolation from one another. The electric field at the origin and change invariably produces a magnetic.
One of the first nature of the variable fields in the mid-nineteenth century began to explore James Maxwell, to whom belongs the merit of the theory of the electromagnetic field. Scientist have shown that moving with the acceleration of electric charges creates an electric field. Change it generates a field of magnetic forces.
The AC magnetic field may be a magnet, if you set it in motion, and electric charge that oscillates or is accelerated. If the charge moves with constant speed, through a conductor carries a steady current, which is characterized by a constant magnetic field. Spreading in space, the electromagnetic field carries energy, which depends on the magnitude of the current in the conductor and frequency of the radiated waves.
The impact of electromagnetic fields on human
The level of all electromagnetic radiation that create the designed person of the technical system are many times greater than the natural radiation of the planet. This field is characterized by a thermal effect that can cause overheating of the tissues of the body and irreversible consequences. For example, prolonged use of a mobile phone, which is the source of radiation, may lead to temperature increases in the brain and lens of the eye.
The electromagnetic field produced by household appliances, can cause the appearance of malignant tumors. This applies in particular to children. Prolonged human presence near a source of electromagnetic waves reduces the efficiency of the immune system leads to diseases of the heart and blood vessels.
Of course, to completely abandon the use of technical means, which are the source of the electromagnetic field, it is impossible. But you can apply the simple preventive measures, for example, use cell phone only with a headset, do not leave cords of the devices in electrical outlets after use of equipment. In everyday life it is recommended to use extension cords and cables with protective shielding.