Supported by the Pierce-Arrow Co. and General Electric in 1931, Tesla took the gasoline engine from a new Pierce-Arrow and replaced it with an 80-horsepower alternating-current (AC) electric motor with no external power source. At a local radio supply shop he bought 12 vacuum tubes, some wires and assorted resistors, and assembled them in a circuit box 24 inches long, 12 inches wide and 6 inches high, with a pair of 3-inch rods sticking out. Getting into the car with the circuit box in the front seat beside him, he pushed the rods in, announced, “We now have power,” and proceeded to test drive the car for a full week, often at speeds of up to 90 mph. His car was never plugged into any electrical receptacle for a recharge. As it was an alternating-current motor and there were no batteries involved, where did the power come from?
Tesla used the collection of vacuum tubes (also called a valve amplifier), wires and assorted resistors to build a radio wave receiver/amplifier 24 inches long, 12 inches wide and 6 inches high, with a pair of 3-inch rods 1/4” in diameter sticking out. The pair of rods that Tesla pushed in were used to close (complete) the circuit – like an on/off switch. The rod ends were most likely the positive and negative leads (connections) between the car antenna and and the radio wave receiver/amplifier. By pushing them into the box containing the radio wave receiver/amplifier the connection was completed allowing the radio waves that were received from the air by the antenna to flow through the receiver/amplifier to the electric motor.
That should be enough that you will look through a few articles, not my problem if you pass.