Question

Two thin dielectric slabs of dielectric constants $k_1$ and $k_2$ $(k_1<k_2)$ are inserted between plates of a parallel plate capacitor, as shown in the figure. The variation of electric field $E$ between the plates with distance $d$ as measured from plate P is correctly shown by

• A.
• B.
• C.
• D.

Answer 1

The correct option is A

In a region of vacuum,
$E=\frac{Q}{{\epsilon }_{0}A}$

In a region where dielectric is present, $E=\frac{Q}{k{\epsilon }_{0}A}\Rightarrow E\propto \frac{1}{k}$

As $k_1<k_2,$ decrease in E is greater for $k_2$ than for $k_1$.