Question

We are sometimes exposed to electric fields. To determine if there is a risk of overload, there is a rule of thumb that prevents sparks from switching if there is a field strength greater than 1kV per mm, ie 1MV / m.
a) How big is the electrical field most between two conductors in a 230V wire (the peak voltage is 324V)? We assume that the distance between the conductors is 2mm. Reply with a rounded integer. Answer in [kV/m]
b) If a person arrives on a railway car, an accident may occur if you get too close to the line. If the voltage is 16kV, at which distance can a spark jump and kill a person? The regulations has ruled that 270mm should be between conductors at this voltage. Then you have warned against wire in humid air, etc. Reply with a rounded integer. Answer in [mm]
c) If the insulation around a conductor to a coffee maker is damaged, at which distance from the conductor can you get a spark to switch to a sink? Answer with two decimals. Answer in [mm]

Answer 1