A parallel plate capacitor with a slab of dielectric constant 3 filling the whole space…
Physics · JEE Main · NTA Exams — Electrostatics
A parallel plate capacitor with a slab of dielectric constant 3 filling the whole space between the plates is charged to certain potential and isolated. Then the slab is drawn out and another slab of equal thickness but dielectric constant 2 is introduced between the plates. The ratio of the energy stored in the capacitor later to that stored initially is
- 2 : 3
- 3 : 2
- 4 : 9
- 9 : 4
Answer
(B) 3 : 2
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