what is the purpose of a tesla coil
Tesla coil The Tesla coil is an electrical resonant transformer circuit designed by inventor Nikola Tesla in 1891.[1][2] It is used to produce high-voltage, low-current, high frequency alternating-current electricity.[3][4][5][6][7][8][9] Tesla experimented with a number of different configurations consisting of two, or sometimes three, coupled resonant electric circuits.
Electromagnet The main advantage of an electromagnet over a permanent magnet is that the magnetic field can be quickly changed by controlling the amount of electric current in the winding. However, unlike a permanent magnet that needs no power, an electromagnet requires a continuous supply of current to maintain the magnetic field.