He carefully analyzed the magnetic effect of current and other phenomena, and thought that he had discovered the effect of current on magnetism and the effect of current on current, so in turn, magnetism should be able to generate electricity. The experiment was recorded in his diary. Faraday got the law of electromagnetic induction from this experiment and invented the generator, which had a far-reaching impact on human civilization. This item also records the thoughts and achievements of other scientists on magnetic energy power generation at the same time.
Experimental background
183 1 year, Faraday experiment found that when the power supply of coil A was turned on or off, the small magnetic needle near coil B suddenly jumped, indicating that there was induced current in coil B at the moment when the power supply was turned on or off.
In the history of physics, the relationship between electricity and magnetism has not been found for a long time, and the phenomena of electricity and magnetism are studied as two parallel topics respectively. It was not until Oster discovered the magnetic effect of current in July 1820 that the study of electricity and magnetism was no longer considered to be isolated from each other, but as a whole.
After the publication of Oster's paper, it aroused strong repercussions in the European scientific community, and invested a lot of manpower and material resources to study electromagnetic phenomena. Since electricity is closely related to magnetism, and electric energy produces magnetism, it is natural to think of its inverse effect; "Magnetic power generation"? To this end, scientists began a long-term experimental exploration.
During the ten years from 1820 to 183 1, many famous scientists at that time, such as Ampere, Fresnel, arago and delia River, devoted themselves to exploring the relationship between magnetism and electricity. They tried to generate current with various strong magnetic fields, but they all failed. The reason is that they insist on steady-state conditions without considering transient effects. Therefore,