Question

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

• A. the copper plate capacitor has a greater capacitance than the iron one
• B. both capacitors 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 equal even if they are unequally charged

Answer 1

Answer: (B), (D)

The correct options are
B both capacitors have equal, non-zero capacitances in the uncharged state
D the capacitances of the two capacitors are equal even if they are unequally charged

Two capacitors one of copper plates and another is of iron

$⟹$ The value of capacitance does not depend on the nature of plates thus,

1) Both capacitors have equal, non-zero capacitance's in uncharged state.

2)The capacitance's of the two capacitors are equal even if they are equally charged.