A Parallel Plate Capacitor of Capacitance C₀ Has Plates of Area

Multiple Choice

A parallel plate capacitor of capacitance C₀ has plates of area A with separation d between them.When it is connected to a battery of voltage V₀,it has charge of magnitude Q₀ on its plates.It is then disconnected from the battery and the space between the plates is filled with a material of dielectric constant 3.After the dielectric is added,the magnitudes of the charge on the plates and the potential difference between them are

A) $\frac { 1 } { 3 }$ Q₀, $\frac { 1 } { 3 }$ V₀.
B) Q₀, $\frac { 1 } { 3 }$ V₀.
C) Q₀,V₀.
D) Q₀,3V₀.
E) 3Q₀,3V₀.