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.
Confidence votes 563. Modern electrical generators make use of Faraday's law to convert mechanical energy in the form of motion into electrical energy. Mechanical energy is used to turn large magnetic coiled in electrical wire, and as the magnets and thus magnetic field moves, an electrical current is induced in the wire producing electricity.