CHAMPVA is a Department of Veterans Affairs program; TRICARE is a regionally managed health care program for active duty and retired members of the uniformed services, their families, and survivors. In some cases a Veteran may appear to be eligible for both/either program on paper.
Quick Answer. Michael Faraday discovered the law of electromagnetic induction in 1831. He realized that current in a circuit can be induced by changing the magnetic field. Faraday tested it by wrapping a paper cylinder with a wire and connecting the coil to a galvanometer. Faraday then moved the magnet back and forth inside the cylinder.
Michael Faradayâs Scientific Achievements and Discoveries. 1  1821: Discovery of Electromagnetic Rotation. 2  1823: Gas Liquefaction and Refrigeration. 3  1825: Discovery of Benzene. 4  1831: Discovery of Electromagnetic Induction. 5  1834: Faradayâs Laws of Electrolysis. 6  1836: Invention of the Faraday Cage.