An air-filled parallel plate capacitor originally has a capacitance of Corig . The capacitor is then connect to a power supply and fully charged. While still connected to the power supply, a dielectric material with a dielectric constant of k is introduced between the plates of the capacitor. How does the charge on the dielectric-filled capacitor, Qnew compare to the original charge (ie. what is the ratio, Qnew/Qorig)

a. 1/k^2
b. K
c. 1, Qnew = Qorig
d. 1/k
e. K^2