JEE Main 2021PhysicsCapacitanceMediumNumerical

JEE Main 2021Capacitance Question with Solution

JEE Main 2021 (16 Mar Shift 2)

Question

In a parallel plate capacitor set up, the plate area of capacitor is 2 m2 and the plates are separated by 1 m. If the space between the plates are filled with a dielectric material of thickness 0.5 m and are 2 m2 (see figure) the capacitance of the set-up will be ε0 ________.

(Dielectric constant of the material =3.2)

(Round off to the Nearest Integer)

Enter your answer

Show full solutionCorrect answer: 3
Correct answer
3

Step-by-step explanation

The given system can be considered as a series combination of two capacitors. The equivalent capacitance can be given as,

1C=1C1+1C21C=d2Kε0A+d2ε0A

C=ε0Ad2K+d2=2ε0AdK+d

=2×2ε013.2+1=4×3.24.2ε0

=3.04ε0

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About this question

This is a previous-year question from JEE Main 2021, covering the Capacitance chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.