Fig. 3
From: Exposure to 50 Hz electromagnetic field changes the efficiency of the scorpion alpha toxin
The setup for the exposure of a cockroach to an electromagnetic field. (a) Insects in the coil. (b) Coil coordinates system. (c-f) The magnetic flux density distribution in the coil along z axis (c, d) and x axis (e, f) for 0.7 mT and 7 mT (coordinates as at b)