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Two parallel plates have equal and opposite charges. When the space between the plates is evacuted, the electric field is `E_0=3.20xx10^5V//m`. When the space is filled with electric the electric field is `E-2.50xx10^5V//m` a. What is the dielectric constant? b. What is the charge density on each surface of the dielectric? |
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Answer» a. `K=E_0/E=(3.20xx10^5)/(2.50xx10^5)` `=1.28` b. `sigma_i=sigma_0(1-1/K)` `=(E_0epsilon_0)(1-1/K)` `=(93.20xx10^5)(8.86xx10^-12)(1-1/1.28)` `=6.2xx10^-7C//m^2` |
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