Two parallel plates have equal and opposite charges when the space between the plates is evacuated. The electric field is `E=3.20x10^5` V//m. . When the space is filled with dielectric, the electric field is `E=2.50x10^5` V/m. The charge density on each surface of dielectric is

Options

A. a)`1.28x10^(-7)C//m^2`
B. b)`4.2x10^(-7)C//m^2`
C. c)`6.2x10^(-7)C//m^2`
D. d)`12.4x10^(-7)C//m^2`

Answer

C