So for my school science fair I decided to make a Savonius wind turbine. It works alright I would say, it out puts a measly 2vac when you spin it full speed with a hair dryer. It is enough to light an led. But I accidentally noticed something strange. Normally the led would light at 1.2vac but if you short the led with a drill bit the led needs alot less voltage to light, about .1vac. If the bit is stationary the led wont light but if you move it around and spin the turbine with your fingers it will light. What could this be?