Physics Circle home Student Login

Home›Chapters›Capacitors PYQs›Dielectrics›Question 33

MHT CET 2025 (19 Apr, Shift 1) · Dielectrics

Dielectrics question from MHT CET 2025 (19 Apr, Shift 1)

Q33MHT CET 2025 · 19 APR · SHIFT 1Medium

Dielectrics

The plates of a parallel plate capacitor are separated by a distance 'd' with air as the medium between them. A dielectric slab of dielectric constant 3 is introduced between the plates so as to increase the capacity by 50%50\%. The thickness of the dielectric slab is

Show answer and solution

Answer: (a)

  1. C′C=dd−t+t3=1.5\frac{C'}{C}=\frac{d}{d-t+\frac{t}{3}}=1.5
  2. d−2t3=2d3⇒t=d2d-\frac{2t}{3}=\frac{2d}{3} \Rightarrow t=\frac{d}{2}
  3. So the answer is (a) d2\frac{d}{2}.
Report a mistake

More questions on Dielectrics