There is an electric field in the resistor that causes current to flow. Ohms law for the resistor can be written in terms of the field

$$J=aE$$

Where $J$ is the current density, $a$ is the material conductivoan $E$ the electric field. $J$ and $E$ are vectors.

Hope this helps

There is an electric field in the resistor that causes current to flow. Ohms law for the resistor can be written in terms of the field

$$J=σE$$

Where $J$ is the current density, $σ$ is the material conductivity $E$ the electric field. $J$ and $E$ are vectors.

Hope this helps