Comment Re:Two hits in the efficiency chain? (Score 1) 246
By Lenz's Law, the only way that you can get a magnetic field from electric current is to have a current input varying in the time domain (AC).
It's the other way around. The only way you can get electric current from a magnetic field is to have the field input varying in the time domain.
Otherwise how would my MRI magnets produce a magnetic field? (DC current is "stored" on the superconducting coil inside them)
It's the other way around. The only way you can get electric current from a magnetic field is to have the field input varying in the time domain.
Otherwise how would my MRI magnets produce a magnetic field? (DC current is "stored" on the superconducting coil inside them)
