Two parallel plate air capacitors are construted, one by a pair of iron plates and the second by a pair of copper plates of same area and same spacings. Then

Options

A. the copper plate capacitor has a greater capacitance than the iron one
B. both capacitors will have equal non zero capacitances, in the uncharged state
C. both capacitors will have equal capacitances only if they are charged equally
D. the capacitances of the two capacitors are unequal even they are unequally charged

Answer

B