The electric chair for putting someone to death is a painful way for someone to go and the electric chair is usually not an instant death.
Usually it takes around 5 to 20 minutes of being electrocuted twice before the death row inmate is actually killed by the electric chair.
There was a case of a death row inmate years ago that survived being put to death in an electric chair which was surprising.
But most people who do get put to death by the electric chair die within 20 minutes of the electricity going through the person.
Electricity is pretty deadly and it's the amps that kills a person but being electrocuted is a very painful way to die.