Question

Two thin dielectric slabs of dielectric constants `K_(1)` and `K_(2) (K_(1) lt 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

Correct Answer - C
Electric field inside parallel plate capacitor having charge `Q` at place where dielectric is absent `= (Q)/(A epsilon_(0))` where dielectric is present `= (Q)/(KA epsilon_(0))`
As `K_(1) lt K_(2)` so `E_(1) gt E_(2)`
Hence graph `(c )` correctly depicts the variation of electric field `E` with distance `d`.