Question

Why would electrons leaving a resistor have less potential energy then when they entered

Answer 1

There is an electric field inside the resistor that the electrons flow against. The E field does work to lower the energy of the electrons.

Answer 2

Here, we are to talk about the potential energy of the electron-battery system. Before the circuit is closed, the entire energy is present in the battery as electrostatic potential energy between electrodes( in the electric field ). Once the circuit is closed, this energy is transferred to the electrons and the energy that the electrons now possess is the kinetic energy( energy transformation ). As the electrons go through the resistor, they give away their kinetic energy( due to collisions with the vibrating lattice ) to the surroundings in the form thermal energy. This energy is lost to the surroundings and cannot be recovered. So, we see that the electron-battery system loses potential energy to the surroundings in the form of thermal energy.

In summary, potential energy of the electron-battery system appears as kinetic energy of the electron. The kinetic energy of the electron then appears as thermal energy at the resistor. In all stages, energy is conserved.

Answer 3

Bueno Una resistencia , estorba el paso de una corriente y disipa parte de ella en calor esa corriente se pierde en el entorno y el remanente es lo que queda de la corriente al atravesar una resistencia Ese efecto fue estudiado por Ohm el valor de las resistecias se le mide en ohmios Se dice que cuando en un circuito tenemos la corriente de 1volt ,la intensidad de 1amp la resistencia sera pues de 1ohm.