The tail of the eel is positively charged and the head of the eel is negatively charged. When an eel touches its tail and head to different parts of an animal it sends electric shocks through that animals body. The shocks are disharges of electricty, which are pulsed at frequencies around 30 to 50 Hertz. We know that , reworking the equation we can get . We also know that is the definition of current.
Power is related to current as .
So throwing all of these together we get . Electric eels mainly shock other fish to stun them so they can eat them. They also shock other animals to keep the animals away from them. Some eels also shock other animals who might accidentally come into contact with them. That is why they sometimes shock humans.