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Capacitor question

2021 · Q132
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  5. /2021 · Q132

Capacitor question

2021 · Q132

NEETPhysicsCapacitorMCQ+4 / −1
A parallel plate capacitor has a uniform electric field E→\overrightarrow EE in the space between the plates. If the distance between the plates is 'd' and the area of each plate is 'A', the energy stored in the capacitor is : (ε\varepsilonε0 = permittivity of free space)
  1. A
    E2Adε0{{{E^2}Ad} \over {{\varepsilon _0}}}ε0​E2Ad​
  2. B
    12ε0E2{1 \over 2}{\varepsilon _0}{E^2}21​ε0​E2
  3. C
    ε0EAd{\varepsilon _0}EAdε0​EAd
  4. D
    12ε0E2Ad{1 \over 2}{\varepsilon _0}{E^2}Ad21​ε0​E2Ad
View written solutionFree

Correct answer: D

Energy = Energy density ×\times× volume

= 12ε0E2Ad{1 \over 2}{\varepsilon _0}{E^2}Ad21​ε0​E2Ad

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