Why is the E-field inside a conducting solid zero?

[yinx]

pardon me for asking such silly question.

Why is it that the E-field in the interior of a conducting solid zero? even when the conducting solid have excess positive (or negative) charges?

and this conducting solid is placed in an external E-field, will the E-field in the conducting solid still be E=0?

can someone pls enlighten me?

thanks,
yinx

 

[Vanadium 50]

If the E-field is non-zero, the charges will move. Once the E-field is zero, they will stop moving.

 

[yinx]

how do i prove this mathematically?

 

[yungman]

Electrons move freely inside conductor, any E field exist inside the conductor will immediately move the electrons over to neutralize the field, no math needed for this. Read the part on how the electron move to form an opposing E field inside the conductor if the conductor is put into an external E field. The inside has to be zero.