Respuesta :
Complete Question
The complete question is shown on the first uploaded image Â
Answer:
a  it is always zero
b  0
c  [tex]\eta = -\epsilon _o E[/tex]
Explanation:ss
Here the  net charge is  on the outer surface of the conductor thus this means that the net charge inside the conductor is zero
Generally the charge density of a conductor is dependent on the charge per unit area  which implies that the charge density is dependent on the net charge  so this  means that the charge density inside the conductor is zero
Â
Generally the direction of electric field this from the  positive charge to the negative charge  so from the question we can deduce  that the negative charge is located on the surface of the conductor
  So We can mathematically define the charge density on the surface of the electric field as
       ∮[tex]E \cdot dA = \frac{-Q}{\epsilon _o}[/tex]
Where E is the electric field
     [tex]dA[/tex] change in unit area
      [tex]-Q[/tex] is the negative charge
     [tex]\epsilon _o[/tex]  is the permittivity of free space
So
     [tex]EA = \frac{-Q}{\epsilon _o }[/tex]
      [tex]\frac{Q}{A} = -\epsilon _o E[/tex]
     [tex]\eta = -\epsilon _o E[/tex]
Where [tex]\eta[/tex] is the charge density
 Â
