Question

why is the electric field inside a solid conductor 0?

Answer 1

Excess charge on a conductor always resides on its surface. It is then said to have reached Electrostatic Equilibrium, whereon there is no further motion of charges inside the conductor.
If the electric field were to be non-zero inside the conductor, it would exert a force on the charges and make them accelerate thus violating the condition of electrostatic equilibrium.
Hope it helped. :)

Answer 2

\[\overrightarrow{E} = - \overrightarrow{grad} V\]
That means that an electric field is created as soon as the is variation of the repartition of charges in the space.

If a material is a conductor, the potential is the same everywhere. so \[\overrightarrow{grad} V = \overrightarrow{E} = 0\]
everywhere in the conductor.

Hope it helped
Posglov

Answer 3

At ELECTROSTATIC EQUILIBRIUM, any charged conductor( arbitrary shape ) will have a net zero electric field inside it. Suppose there is a net electric field inside the conductor. The free electrons inside the conductor would move under the influence of the net electric field. Under electrostatic conditions, all charges inside the conductor should remain at rest( static ). So, it is important to know that the electric field inside the conductor will be zero under electrostatic conditions.

Answer 4

En el interior de un conductor electrico no importa el diametro las corrrientes estan en equilibrio Te plo podria explicar con la gravedad de la tierra Si haces un hoyo atraves del palneta y que pase de lado a lado un objeto caeria hasta justamente el centro y alli se quedaria Ni para arriba ni para abajo asi de ese modo sucede con los electrones en el centro de un conductor