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.
2/26/2012. 1. James A. Mynderse ME588 â DC Motors 1. DC MOTORS. Faraday demonstrated in the mid-19th century. Simple operation âmore voltage translates to more speed. With the introduction of AC power in the early 20th century, AC. motors have displaced DC motors in many applications. Since DC motors are easier to control, they are still retained in. difficult control applications. Two basic mode of operation: