DENJIRO: I have here a Tesla coil. It’s a device invented by Nikola Tesla that produces highvoltage electricity. Tesla invented the Tesla coil in 1891. The basic principle is the same as a transformer. It is made with two coils. First, let me explain how the outer coil works. This coil has been wrapped around 15 times. I also have a condenser consisting of a plastic board with aluminum foil. Over here, I have two metal balls facing each other with a bit of space in between. And this here is the power source.
After I turn the power on and enough electricity has been stored in the condenser, there is discharge between the two metal balls. When this happens, the condenser and coil cause a very fast electrical oscillation at the speed of 600,000 times per second in the coil.
NARRATOR: Now, we put another coil inside the coil that has been wrapped around 15 times. The two coils are not connected.
DENJIRO: The coil on the inside has been wrapped around about 1,000 times. When highfrequency electrical oscillation of 600,000 times per second is produced in the outside coil, there is efficient electromagnetic induction, and electrical oscillation of 600,000 times per second occurs in the inside coil as well. Furthermore, the ratio of number of coil wraps can produce high voltage in the inside coil. As a result, there is a highvoltage discharge of 600,000 Hz at the sphere on top.
Why did Tesla create a device like this? Here’s the answer. I’m going to bring this fluorescent light bulb that’s not connected to a power source close to the Tesla coil.
GIRL: It turned on!
DENJIRO: The fluorescent light bulb turned on even though it’s not connected to the Tesla coil because the Tesla coil can transmit electric energy. Tesla was actually trying to transmit electricity with his invention. His dream was to create massive Tesla coils around the world and transmit electricity without wires. Although this hasn’t been realized to this day, Tesla was intent on wireless electricity transmission.
I hope energy will bring you all happiness. Our magic word is "Happy Energy!"