This is my first time asking a question on this forum so I hope my question wouldn't violate any policies. Thank you in advanced for your help.
I have been trying to learn about the vacuum-tube diodes and there is a point mentioned in a lot of texts that I have not been able to understand.
In a space-charge limited condition, the cathode is heated and electrons are boiled off and leave the cathode at zero velocity. At the same time, the electric field at the cathode is zero. This is my problem. If the electric field is zero at the cathode, how could the electrons there, which have zero velocity, accelerate and move to the anode?
Thank you a lot for your help.