CBSE Class 12 · 2006 · CapacitanceVery Short Answer

\textit{Case study — dielectrics in capacitors:} A dielectric slab placed in an external field develops opposite bound charges on its faces, setting up an internal field; this raises a capacitor's capacitance and alters its stored energy. Which of the following is a polar molecul …

Which of the following statements about dielectrics is correct?

When a dielectric slab is inserted between the plates of an \emph{isolated} charged capacitor, the energy stored in it

An air-filled capacitor with plate area $A$ and plate separation $d$ has capacitance $C_0$. A slab of dielectric constant $K$, area $A$ and thickness $\frac{d}{5}$ is inserted between the plates. The capacitance becomes

Two capacitors of capacitances $2C_0$ and $6C_0$ are first connected in series and then in parallel across the same battery. The ratio of the energy stored in the series combination to that in the parallel combination is

A parallel plate capacitor (A) of capacitance $C$ is charged by a battery to voltage $V$. The battery is disconnected and an uncharged capacitor (B) of capacitance $2C$ is connected across A. Find the ratio of (i) final charges on A and B, and (ii) total electrostatic energy stor …