My mom had some chest pain and a cough in the middle of the night, so she went to the 24 hr center at city of hope. They drained her lungs and sent her home after she seemed to be ok. She's been home with no new issues. Then I get an email from the doctor that the fluid came back positive for cancer.
Electromagnetic induction is the production of an electromotive force across a conductor exposed to time varying magnetic fields. Michael Faraday, who mathematically described Faraday's law of induction, is generally credited with its discovery in 1831.hen the coils are stationary, no current is induced. But when the small coil is moved in or out of the large coil (B) , the magnetic flux through the large coil changes, inducing a current which is detected by the galvanometer (G) .
The big breakthrough, of course, was electricity. Nikola Tesla's development of alternating current motors made possible the invention of oscillating fans in the early 20 th century. And in 1902, a 25-year-old engineer from New York named Willis Carrier invented the first modern air-conditioning system.The mechanical unit, which sent air through water-cooled coils, was not aimed at human comfort, however; it was designed to control humidity in the printing plant where he worked.he big breakthrough, of course, was electricity. Nikola Tesla's development of alternating current motors made possible the invention of oscillating fans in the early 20 th century. And in 1902, a 25-year-old engineer from New York named Willis Carrier invented the first modern air-conditioning system.