Do electric automobiles produced carbon dioxide?

It depends on the source of the electricity used to power them. Power plants can generate carbon dioxide a lot (coal and oil fired) or a little (watering nuclear), Although the car does not itself generate carbon dioxide the source of its power does and so the car is responsible for the carbon dioxide footprint. In areas serviced by coal fired power plants the carbon footprint of an electric car may be very similar to that of a hybrid or efficient conventional fuel car.