Question

When a metal plate is introduced between the two plates of a charged capacitor and insulated from them, then

• A. the metal plate divides the capacitor into two capacitors connected in parallel to each other
• B. the metal plate divides the capacitor into two capacitors connected in series with each other
• C. the metal plate is equivalent to a dielectric of zero dielectric constant
• D. the metal plate is equivalent to a dielectric of infinite dielectric constant

Answer 1

Answer: (B), (D)

the metal plate divides the capacitor into two capacitors connected in series with each other
the metal plate is equivalent to a dielectric of infinite dielectric constant

The capacitor is divided into two capacitors joined in series. So (b) is correct. Also as K for a metal is $\infty$, therefore (d) is also correct.