Two thin dielectric slabs of dielectric constants $$K_1~\text{and}~K_2(K_{1} < K_{2})$$ are inserted between plates of a parallel 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:

 1 2 3 4
Subtopic: Â Dielectrics in Capacitors |
Â 77%
From NCERT
NEET - 2014
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

A parallel plate capacitor is made of two dielectric blocks in series. One of the blocks has thickness $$d_1$$ and dielectric constant $$K_1$$ and the other has thickness $$d_2$$ and dielectric constant $$K_2$$, as shown in the figure. This arrangement can be thought of as a dielectric slab of thickness $$d= d_1+d_2$$ and effective dielectric constant $$K$$. The $$K$$ is:

 1 $$\frac{{K}_{1} {d}_{1}+{K}_{2} {d}_{2}}{{d}_{1}+{d}_{1}}$$ 2 $$\frac{{K}_{1} {d}_{1}+{K}_{2} {d}_{2}}{{K}_{1}+{K}_{2}}$$ 3 $$\frac{{K}_{1} {K}_{2}\left({d}_{1}+{d}_{2}\right)}{{K}_{1} {d}_{2}+{K}_{2} {d}_{1}}$$ 4 $$\frac{2 {K}_{1} {K}_{2}}{{K}_{1}+{K}_{2}}$$
Subtopic: Â Dielectrics in Capacitors |
Â 67%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints