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Author Topic: why the voltage drop to near zero ?  (Read 1427 times)

Offline fs4590

  • Newbie
  • *
  • Posts: 1
why the voltage drop to near zero ?
« on: April 20, 2019, 12:37:48 PM »
i stacked 6 air coils on top of each others,each coil have about 5 mh,  all connected in series, when i pass a magnet throw the coils (  not on top of stack of coils ) , i get a reading on my multi-meter  of an average of 20v ,but when i connect a 24 ohms resistor as a load ,the voltage drops to near zero .
can anyone tell me why the voltage is disappearing ?

Offline burnit0017

  • Sr. Member
  • ****
  • Posts: 296
Re: why the voltage drop to near zero ?
« Reply #1 on: April 23, 2019, 12:49:34 AM »
Hi, how fast is the magnet moving? I * R = V   I'm thinking the magnet is not moving fast enough. Then you have to consider the I squared R loss of the copper coils.