Does a resistor affect the electric field in a circuit?

[Chengjun Li]

We all know that wherever there is potential difference in space, there will be electric field there. So if we set a power supply to output 1V, but we connect the two leads to nothing, just leave them in air, the ends of the two leads have a potential difference of 1V, there will be a electric field produced between the two ends. My question is if we connect the two leads to a resistor, will the electric field be different from without a resistor?Will the electric field in this case only exists inside the resistor?

 

[Dale]

There is still an electric field outside the resistor. What remains inside the resistor is current.

The details of the field outside the resistor are a little surprising and complicated: http://depa.fquim.unam.mx/amyd/arch...ia_a_otros_elementos_de_un_circuito_20867.pdf