The electric field generated inside the body when a pulsing magnetic field passes through tissue. As the pulse changes strength, it creates tiny electrical currents in the body's fluids and cells. This is the primary mechanism behind PEMF therapy's effect on tissue. The induced field's strength depends on how quickly the magnetic field changes (dB/dt), not on peak field strength alone. That's why pulse sharpness and rise time matter as much as peak Gauss for effectiveness.
A magnetic field that changes in time induces an electric field in the tissue it passes through. This is Faraday's law, and it is why the speed of the field change (the slew rate) matters more than the field's peak strength: a faster change induces a stronger electric field, which is what stimulates the body.
